diff --git a/docs/dotprompt.md b/docs/dotprompt.md
index c0a286092..706ec906e 100644
--- a/docs/dotprompt.md
+++ b/docs/dotprompt.md
@@ -53,7 +53,7 @@ const result = await greetingPrompt.generate({
   },
 });
 
-console.log(result.text());
+console.log(result.text);
 ```
 
 Dotprompt's syntax is based on the [Handlebars](https://handlebarsjs.com/guide/)
@@ -183,7 +183,7 @@ const myPrompt = promptRef("myPrompt");
 const result = await myPrompt.generate<typeof MySchema>({...});
 
 // now strongly typed as MySchema
-result.output();
+result.output;
 ```
 
 ## Overriding Prompt Metadata
@@ -237,7 +237,7 @@ const menu = await createMenuPrompt.generate({
   },
 });
 
-console.log(menu.output());
+console.log(menu.output);
 ```
 
 Output conformance is achieved by inserting additional instructions into the
@@ -340,7 +340,7 @@ const result = await describeImagePrompt.generate({
   },
 });
 
-console.log(result.text());
+console.log(result.text);
 ```
 
 ## Partials
diff --git a/docs/evaluation.md b/docs/evaluation.md
index aa750f04d..613a9f77f 100644
--- a/docs/evaluation.md
+++ b/docs/evaluation.md
@@ -204,7 +204,7 @@ export const synthesizeQuestions = defineFlow(
           text: `Generate one question about the text below: ${chunks[i]}`,
         },
       });
-      questions.push(qResponse.text());
+      questions.push(qResponse.text);
     }
     return questions;
   }
diff --git a/docs/get-started.md b/docs/get-started.md
index 0b7c02b89..694f89c02 100644
--- a/docs/get-started.md
+++ b/docs/get-started.md
@@ -131,7 +131,7 @@ so that it can be used outside of a Node project.
         // Handle the response from the model API. In this sample, we just convert
         // it to a string, but more complicated flows might coerce the response into
         // structured output or chain the response into another LLM call, etc.
-        return llmResponse.text();
+        return llmResponse.text;
       }
     );
 
diff --git a/docs/models.md b/docs/models.md
index 473ee8ab9..c1731469d 100644
--- a/docs/models.md
+++ b/docs/models.md
@@ -109,7 +109,7 @@ configureGenkit(/* ... */);
     prompt: 'Invent a menu item for a pirate themed restaurant.',
   });
 
-  console.log(await llmResponse.text());
+  console.log(await llmResponse.text);
 })();
 ```
 
@@ -339,7 +339,7 @@ object's `output()` method:
 ```ts
 type MenuItem = z.infer<typeof MenuItemSchema>;
 
-const output: MenuItem | null = llmResponse.output();
+const output: MenuItem | null = llmResponse.output;
 ```
 
 #### Handling errors
@@ -425,7 +425,7 @@ Handle each of these chunks as they become available:
 ```ts
 for await (const responseChunkData of llmResponseStream.stream()) {
   const responseChunk = responseChunkData as GenerateResponseChunk;
-  console.log(responseChunk.text());
+  console.log(responseChunk.text);
 }
 ```
 
@@ -454,7 +454,7 @@ const llmResponseStream = await generateStream({
 for await (const responseChunkData of llmResponseStream.stream()) {
   const responseChunk = responseChunkData as GenerateResponseChunk<Menu>;
   // output() returns an object representing the entire output so far
-  const output: Menu | null = responseChunk.output();
+  const output: Menu | null = responseChunk.output;
   console.log(output);
 }
 ```
diff --git a/docs/plugin-authoring-evaluator.md b/docs/plugin-authoring-evaluator.md
index bba9d3211..b5604229b 100644
--- a/docs/plugin-authoring-evaluator.md
+++ b/docs/plugin-authoring-evaluator.md
@@ -110,9 +110,9 @@ export async function deliciousnessScore<
   });
 
   // Parse the output
-  const parsedResponse = response.output();
+  const parsedResponse = response.output;
   if (!parsedResponse) {
-    throw new Error(`Unable to parse evaluator response: ${response.text()}`);
+    throw new Error(`Unable to parse evaluator response: ${response.text}`);
   }
 
   // Return a scored response
diff --git a/docs/prompts.md b/docs/prompts.md
index 1ecf5715a..f3e915570 100644
--- a/docs/prompts.md
+++ b/docs/prompts.md
@@ -100,7 +100,7 @@ const response = await (threeGreetingsPrompt.generate<typeof outputSchema>(
   { input: { name: 'Fred' } }
 ));
 
-response.output()?.likeAPirate
+response.output?.likeAPirate
 // "Ahoy there, Fred!  May the winds be ever in your favor!"
 ```
 
diff --git a/docs/rag.md b/docs/rag.md
index 0adff7691..23b459ed0 100644
--- a/docs/rag.md
+++ b/docs/rag.md
@@ -296,7 +296,7 @@ export const menuQAFlow = defineFlow(
       context: docs,
     });
 
-    const output = llmResponse.text();
+    const output = llmResponse.text;
     return output;
   }
 );
@@ -333,7 +333,7 @@ defineSimpleRetriever({
   // and several keys to use as metadata
   metadata: ['from', 'to', 'subject'],
 } async (query, config) => {
-  const result = await searchEmails(query.text(), {limit: config.limit});
+  const result = await searchEmails(query.text, {limit: config.limit});
   return result.data.emails;
 });
 ```
@@ -433,7 +433,7 @@ export const rerankFlow = defineFlow(
     });
 
     return rerankedDocuments.map((doc) => ({
-      text: doc.text(),
+      text: doc.text,
       score: doc.metadata.score,
     }));
   }
diff --git a/genkit-tools/cli/config/firebase.index.ts.template b/genkit-tools/cli/config/firebase.index.ts.template
index c7030f9f1..f8c8217bf 100644
--- a/genkit-tools/cli/config/firebase.index.ts.template
+++ b/genkit-tools/cli/config/firebase.index.ts.template
@@ -59,6 +59,6 @@ export const menuSuggestionFlow = onFlow(
 		// convert it to a string, but more complicated flows might coerce the
 		// response into structured output or chain the response into another
 		// LLM call, etc.
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
diff --git a/genkit-tools/cli/config/nextjs.genkit.ts.template b/genkit-tools/cli/config/nextjs.genkit.ts.template
index ed619a3be..c1c05d8f8 100644
--- a/genkit-tools/cli/config/nextjs.genkit.ts.template
+++ b/genkit-tools/cli/config/nextjs.genkit.ts.template
@@ -39,7 +39,7 @@ const menuSuggestionFlow = ai.defineFlow(
     // convert it to a string, but more complicated flows might coerce the
     // response into structured output or chain the response into another
     // LLM call, etc.
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
 
diff --git a/genkit-tools/cli/config/nodejs.index.ts.template b/genkit-tools/cli/config/nodejs.index.ts.template
index 5f480bc47..28388b239 100644
--- a/genkit-tools/cli/config/nodejs.index.ts.template
+++ b/genkit-tools/cli/config/nodejs.index.ts.template
@@ -39,6 +39,6 @@ export const menuSuggestionFlow = ai.defineFlow(
 		// Handle the response from the model API. In this sample, we just convert
     // it to a string, but more complicated flows might coerce the response into
     // structured output or chain the response into another LLM call, etc.
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
diff --git a/genkit-tools/common/src/utils/analytics.ts b/genkit-tools/common/src/utils/analytics.ts
index 67190b88a..5cc1d34ed 100644
--- a/genkit-tools/common/src/utils/analytics.ts
+++ b/genkit-tools/common/src/utils/analytics.ts
@@ -292,7 +292,7 @@ async function recordInternal(
       if (!response.ok) {
         logger.warn(`Analytics validation HTTP error: ${response.status}`);
       }
-      const respBody = await response.text();
+      const respBody = await response.text;
       logger.info(`Analytics validation result: ${respBody}`);
     }
     // response.ok / response.status intentionally ignored, see comment below.
diff --git a/js/ai/src/document.ts b/js/ai/src/document.ts
index d9ff71f11..70ed10f17 100644
--- a/js/ai/src/document.ts
+++ b/js/ai/src/document.ts
@@ -70,7 +70,7 @@ export class Document implements DocumentData {
    * Concatenates all `text` parts present in the document with no delimiter.
    * @returns A string of all concatenated text parts.
    */
-  text(): string {
+  get text(): string {
     return this.content.map((part) => part.text || '').join('');
   }
 
@@ -79,7 +79,7 @@ export class Document implements DocumentData {
    * (for example) an image.
    * @returns The first detected `media` part in the document.
    */
-  media(): { url: string; contentType?: string } | null {
+  get media(): { url: string; contentType?: string } | null {
     return this.content.find((part) => part.media)?.media || null;
   }
 
diff --git a/js/ai/src/generate.ts b/js/ai/src/generate.ts
index dcce0e71e..b4e95716a 100755
--- a/js/ai/src/generate.ts
+++ b/js/ai/src/generate.ts
@@ -70,8 +70,8 @@ export class Message<T = unknown> implements MessageData {
    *
    * @returns The structured output contained in the message.
    */
-  output(): T {
-    return this.data() || extractJson<T>(this.text());
+  get output(): T {
+    return this.data || extractJson<T>(this.text);
   }
 
   toolResponseParts(): ToolResponsePart[] {
@@ -83,7 +83,7 @@ export class Message<T = unknown> implements MessageData {
    * Concatenates all `text` parts present in the message with no delimiter.
    * @returns A string of all concatenated text parts.
    */
-  text(): string {
+  get text(): string {
     return this.content.map((part) => part.text || '').join('');
   }
 
@@ -92,7 +92,7 @@ export class Message<T = unknown> implements MessageData {
    * (for example) an image from a generation expected to create one.
    * @returns The first detected `media` part in the message.
    */
-  media(): { url: string; contentType?: string } | null {
+  get media(): { url: string; contentType?: string } | null {
     return this.content.find((part) => part.media)?.media || null;
   }
 
@@ -100,7 +100,7 @@ export class Message<T = unknown> implements MessageData {
    * Returns the first detected `data` part of a message.
    * @returns The first `data` part detected in the message (if any).
    */
-  data(): T | null {
+  get data(): T | null {
     return this.content.find((part) => part.data)?.data as T | null;
   }
 
@@ -108,7 +108,7 @@ export class Message<T = unknown> implements MessageData {
    * Returns all tool request found in this message.
    * @returns Array of all tool request found in this message.
    */
-  toolRequests(): ToolRequestPart[] {
+  get toolRequests(): ToolRequestPart[] {
     return this.content.filter(
       (part) => !!part.toolRequest
     ) as ToolRequestPart[];
@@ -187,7 +187,7 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
     }
 
     if (request?.output?.schema || this.request?.output?.schema) {
-      const o = this.output();
+      const o = this.output;
       parseSchema(o, {
         jsonSchema: request?.output?.schema || this.request?.output?.schema,
       });
@@ -211,8 +211,8 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
    * @param index The candidate index from which to extract output. If not provided, finds first candidate that conforms to output schema.
    * @returns The structured output contained in the selected candidate.
    */
-  output(): O | null {
-    return this.message?.output() || null;
+  get output(): O | null {
+    return this.message?.output || null;
   }
 
   /**
@@ -220,8 +220,8 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
    * @param index The candidate index from which to extract text, defaults to first candidate.
    * @returns A string of all concatenated text parts.
    */
-  text(): string {
-    return this.message?.text() || '';
+  get text(): string {
+    return this.message?.text || '';
   }
 
   /**
@@ -230,8 +230,8 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
    * @param index The candidate index from which to extract media, defaults to first candidate.
    * @returns The first detected `media` part in the candidate.
    */
-  media(): { url: string; contentType?: string } | null {
-    return this.message?.media() || null;
+  get media(): { url: string; contentType?: string } | null {
+    return this.message?.media || null;
   }
 
   /**
@@ -239,8 +239,8 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
    * @param index The candidate index from which to extract data, defaults to first candidate.
    * @returns The first `data` part detected in the candidate (if any).
    */
-  data(): O | null {
-    return this.message?.data() || null;
+  get data(): O | null {
+    return this.message?.data || null;
   }
 
   /**
@@ -248,8 +248,8 @@ export class GenerateResponse<O = unknown> implements ModelResponseData {
    * @param index The candidate index from which to extract tool requests, defaults to first candidate.
    * @returns Array of all tool request found in the candidate.
    */
-  toolRequests(): ToolRequestPart[] {
-    return this.message?.toolRequests() || [];
+  get toolRequests(): ToolRequestPart[] {
+    return this.message?.toolRequests || [];
   }
 
   /**
@@ -316,7 +316,7 @@ export class GenerateResponseChunk<T = unknown>
    * Concatenates all `text` parts present in the chunk with no delimiter.
    * @returns A string of all concatenated text parts.
    */
-  text(): string {
+  get text(): string {
     return this.content.map((part) => part.text || '').join('');
   }
 
@@ -325,7 +325,7 @@ export class GenerateResponseChunk<T = unknown>
    * (for example) an image from a generation expected to create one.
    * @returns The first detected `media` part in the chunk.
    */
-  media(): { url: string; contentType?: string } | null {
+  get media(): { url: string; contentType?: string } | null {
     return this.content.find((part) => part.media)?.media || null;
   }
 
@@ -333,7 +333,7 @@ export class GenerateResponseChunk<T = unknown>
    * Returns the first detected `data` part of a chunk.
    * @returns The first `data` part detected in the chunk (if any).
    */
-  data(): T | null {
+  get data(): T | null {
     return this.content.find((part) => part.data)?.data as T | null;
   }
 
@@ -341,7 +341,7 @@ export class GenerateResponseChunk<T = unknown>
    * Returns all tool request found in this chunk.
    * @returns Array of all tool request found in this chunk.
    */
-  toolRequests(): ToolRequestPart[] {
+  get toolRequests(): ToolRequestPart[] {
     return this.content.filter(
       (part) => !!part.toolRequest
     ) as ToolRequestPart[];
@@ -351,7 +351,7 @@ export class GenerateResponseChunk<T = unknown>
    * Attempts to extract the longest valid JSON substring from the accumulated chunks.
    * @returns The longest valid JSON substring found in the accumulated chunks.
    */
-  output(): T | null {
+  get output(): T | null {
     if (!this.accumulatedChunks) return null;
     const accumulatedText = this.accumulatedChunks
       .map((chunk) => chunk.content.map((part) => part.text || '').join(''))
diff --git a/js/ai/src/model/middleware.ts b/js/ai/src/model/middleware.ts
index 85a30c0b7..11c320cb9 100644
--- a/js/ai/src/model/middleware.ts
+++ b/js/ai/src/model/middleware.ts
@@ -230,7 +230,7 @@ const CONTEXT_ITEM_TEMPLATE = (
   } else if (options?.citationKey === undefined) {
     out += `[${d.metadata?.['ref'] || d.metadata?.['id'] || index}]: `;
   }
-  out += d.text() + '\n';
+  out += d.text + '\n';
   return out;
 };
 
diff --git a/js/ai/src/testing/model-tester.ts b/js/ai/src/testing/model-tester.ts
index 14096c8ae..3cf041ae9 100644
--- a/js/ai/src/testing/model-tester.ts
+++ b/js/ai/src/testing/model-tester.ts
@@ -29,7 +29,7 @@ const tests: Record<string, TestCase> = {
       prompt: 'just say "Hi", literally',
     });
 
-    const got = response.text().trim();
+    const got = response.text.trim();
     assert.match(got, /Hi/i);
   },
   multimodal: async (model: string) => {
@@ -54,7 +54,7 @@ const tests: Record<string, TestCase> = {
     });
 
     const want = '';
-    const got = response.text().trim();
+    const got = response.text.trim();
     assert.match(got, /plus/i);
   },
   history: async (model: string) => {
@@ -74,11 +74,11 @@ const tests: Record<string, TestCase> = {
       messages: response1.messages,
     });
 
-    const got = response.text().trim();
+    const got = response.text.trim();
     assert.match(got, /Glorb/);
   },
   'system prompt': async (model: string) => {
-    const response = await generate({
+    const { text } = await generate({
       model,
       prompt: 'Hi',
       messages: [
@@ -94,7 +94,7 @@ const tests: Record<string, TestCase> = {
     });
 
     const want = 'Bye';
-    const got = response.text().trim();
+    const got = text.trim();
     assert.equal(got, want);
   },
   'structured output': async (model: string) => {
@@ -114,7 +114,7 @@ const tests: Record<string, TestCase> = {
       name: 'Jack',
       occupation: 'Lumberjack',
     };
-    const got = response.output();
+    const got = response.output;
     assert.deepEqual(want, got);
   },
   'tool calling': async (model: string) => {
@@ -125,13 +125,13 @@ const tests: Record<string, TestCase> = {
       skip();
     }
 
-    const response = await generate({
+    const { text } = await generate({
       model,
       prompt: 'what is a gablorken of 2? use provided tool',
       tools: ['gablorkenTool'],
     });
 
-    const got = response.text().trim();
+    const got = text.trim();
     assert.match(got, /9.407/);
   },
 };
diff --git a/js/ai/tests/generate/generate_test.ts b/js/ai/tests/generate/generate_test.ts
index 4e514d74b..cae8e419c 100644
--- a/js/ai/tests/generate/generate_test.ts
+++ b/js/ai/tests/generate/generate_test.ts
@@ -108,7 +108,7 @@ describe('GenerateResponse', () => {
         const response = new GenerateResponse(
           test.responseData as GenerateResponseData
         );
-        assert.deepStrictEqual(response.output(), test.expectedOutput);
+        assert.deepStrictEqual(response.output, test.expectedOutput);
       });
     }
   });
@@ -213,7 +213,7 @@ describe('GenerateResponse', () => {
         }),
         finishReason: 'stop',
       });
-      assert.deepStrictEqual(response.toolRequests(), []);
+      assert.deepStrictEqual(response.toolRequests, []);
     });
     it('returns tool call if present', () => {
       const toolCall = {
@@ -230,7 +230,7 @@ describe('GenerateResponse', () => {
         }),
         finishReason: 'stop',
       });
-      assert.deepStrictEqual(response.toolRequests(), [toolCall]);
+      assert.deepStrictEqual(response.toolRequests, [toolCall]);
     });
     it('returns all tool calls', () => {
       const toolCall1 = {
@@ -254,7 +254,7 @@ describe('GenerateResponse', () => {
         }),
         finishReason: 'stop',
       });
-      assert.deepStrictEqual(response.toolRequests(), [toolCall1, toolCall2]);
+      assert.deepStrictEqual(response.toolRequests, [toolCall1, toolCall2]);
     });
   });
 });
@@ -515,7 +515,7 @@ describe('GenerateResponseChunk', () => {
           const responseChunk: GenerateResponseChunk =
             new GenerateResponseChunk(chunkData, accumulatedChunks);
 
-          const output = responseChunk.output();
+          const output = responseChunk.output;
 
           assert.deepStrictEqual(output, test.correctJson);
         });
@@ -601,7 +601,7 @@ describe('generate', () => {
     );
 
     const want = '[Echo: (banana)]';
-    assert.deepStrictEqual(response.text(), want);
+    assert.deepStrictEqual(response.text, want);
   });
 });
 
diff --git a/js/ai/tests/model/document_test.ts b/js/ai/tests/model/document_test.ts
index d91bdb657..c1adaa97f 100644
--- a/js/ai/tests/model/document_test.ts
+++ b/js/ai/tests/model/document_test.ts
@@ -23,13 +23,13 @@ describe('document', () => {
     it('retuns single text part', () => {
       const doc = new Document({ content: [{ text: 'foo' }] });
 
-      assert.equal(doc.text(), 'foo');
+      assert.equal(doc.text, 'foo');
     });
 
     it('retuns concatenated text part', () => {
       const doc = new Document({ content: [{ text: 'foo' }, { text: 'bar' }] });
 
-      assert.equal(doc.text(), 'foobar');
+      assert.equal(doc.text, 'foobar');
     });
   });
 
@@ -42,7 +42,7 @@ describe('document', () => {
         ],
       });
 
-      assert.deepEqual(doc.media(), { url: 'data:foo' });
+      assert.deepEqual(doc.media, { url: 'data:foo' });
     });
   });
 
diff --git a/js/ai/tests/model/middleware_test.ts b/js/ai/tests/model/middleware_test.ts
index 99987c351..9b3eb7054 100644
--- a/js/ai/tests/model/middleware_test.ts
+++ b/js/ai/tests/model/middleware_test.ts
@@ -521,7 +521,7 @@ describe('augmentWithContext', () => {
           metadata: { uid: 'second' },
         },
       ],
-      { itemTemplate: (d) => `* (${d.metadata!.uid}) -- ${d.text()}\n` }
+      { itemTemplate: (d) => `* (${d.metadata!.uid}) -- ${d.text}\n` }
     );
     assert.deepEqual(result[0].content.at(-1), {
       text: `${CONTEXT_PREFACE}* (first) -- i am context\n* (second) -- i am more context\n\n`,
diff --git a/js/ai/tests/reranker/reranker_test.ts b/js/ai/tests/reranker/reranker_test.ts
index 1b67a663f..4942e02b6 100644
--- a/js/ai/tests/reranker/reranker_test.ts
+++ b/js/ai/tests/reranker/reranker_test.ts
@@ -38,9 +38,9 @@ describe('reranker', () => {
           },
           async (query, documents, options) => {
             // Custom reranking logic: score based on string length similarity to query
-            const queryLength = query.text().length;
+            const queryLength = query.text.length;
             const rerankedDocs = documents.map((doc) => {
-              const score = Math.abs(queryLength - doc.text().length);
+              const score = Math.abs(queryLength - doc.text.length);
               return {
                 ...doc,
                 metadata: { ...doc.metadata, score },
@@ -75,8 +75,8 @@ describe('reranker', () => {
 
       // Validate the reranked results
       assert.equal(rerankedDocuments.length, 2);
-      assert(rerankedDocuments[0].text().includes('a bit longer'));
-      assert(rerankedDocuments[1].text().includes('short'));
+      assert(rerankedDocuments[0].text.includes('a bit longer'));
+      assert(rerankedDocuments[1].text.includes('short'));
     });
 
     it('handles missing options gracefully', async () => {
diff --git a/js/core/src/flow-client/client.ts b/js/core/src/flow-client/client.ts
index 46656ce77..111e4e479 100644
--- a/js/core/src/flow-client/client.ts
+++ b/js/core/src/flow-client/client.ts
@@ -28,10 +28,10 @@ const __flowStreamDelimiter = '\n';
  *   url: 'https://my-flow-deployed-url',
  *   input: 'foo',
  * });
- * for await (const chunk of response.stream()) {
+ * for await (const chunk of response.stream) {
  *   console.log(chunk);
  * }
- * console.log(await response.output());
+ * console.log(await response.output);
  * ```
  */
 export function streamFlow({
diff --git a/js/genkit/tests/chat_test.ts b/js/genkit/tests/chat_test.ts
index 263032793..a00eda1f9 100644
--- a/js/genkit/tests/chat_test.ts
+++ b/js/genkit/tests/chat_test.ts
@@ -33,12 +33,12 @@ describe('session', () => {
     const session = await ai.chat();
     let response = await session.send('hi');
 
-    assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+    assert.strictEqual(response.text, 'Echo: hi; config: {}');
 
     response = await session.send('bye');
 
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: hi,Echo: hi,; config: {},bye; config: {}'
     );
     assert.deepStrictEqual(response.messages, [
@@ -64,21 +64,21 @@ describe('session', () => {
 
     let chunks: string[] = [];
     for await (const chunk of stream) {
-      chunks.push(chunk.text());
+      chunks.push(chunk.text);
     }
-    assert.strictEqual((await response).text(), 'Echo: hi; config: {}');
+    assert.strictEqual((await response).text, 'Echo: hi; config: {}');
     assert.deepStrictEqual(chunks, ['3', '2', '1']);
 
     ({ response, stream } = await session.sendStream('bye'));
 
     chunks = [];
     for await (const chunk of stream) {
-      chunks.push(chunk.text());
+      chunks.push(chunk.text);
     }
 
     assert.deepStrictEqual(chunks, ['3', '2', '1']);
     assert.strictEqual(
-      (await response).text(),
+      (await response).text,
       'Echo: hi,Echo: hi,; config: {},bye; config: {}'
     );
     assert.deepStrictEqual((await response).messages, [
@@ -109,7 +109,7 @@ describe('session', () => {
     const response = await session.send('hi');
 
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: hi Genkit,hi; config: {"temperature":11}'
     );
   });
@@ -128,7 +128,7 @@ describe('session', () => {
     );
 
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: hi Genkit; config: {"version":"abc","temperature":11}'
     );
   });
diff --git a/js/genkit/tests/models_test.ts b/js/genkit/tests/models_test.ts
index 23d800599..23298d6c0 100644
--- a/js/genkit/tests/models_test.ts
+++ b/js/genkit/tests/models_test.ts
@@ -35,17 +35,17 @@ describe('models', () => {
         const response = await ai.generate({
           prompt: 'hi',
         });
-        assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+        assert.strictEqual(response.text, 'Echo: hi; config: {}');
       });
 
       it('calls the default model with just a string prompt', async () => {
         const response = await ai.generate('hi');
-        assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+        assert.strictEqual(response.text, 'Echo: hi; config: {}');
       });
 
       it('calls the default model with just parts prompt', async () => {
         const response = await ai.generate([{ text: 'hi' }]);
-        assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+        assert.strictEqual(response.text, 'Echo: hi; config: {}');
       });
 
       it('calls the default model system', async () => {
@@ -54,7 +54,7 @@ describe('models', () => {
           system: 'talk like a pirate',
         });
         assert.strictEqual(
-          response.text(),
+          response.text,
           'Echo: system: talk like a pirate,hi; config: {}'
         );
         assert.deepStrictEqual(response.request, {
@@ -82,9 +82,9 @@ describe('models', () => {
 
         const chunks: string[] = [];
         for await (const chunk of stream) {
-          chunks.push(chunk.text());
+          chunks.push(chunk.text);
         }
-        assert.strictEqual((await response).text(), 'Echo: hi; config: {}');
+        assert.strictEqual((await response).text, 'Echo: hi; config: {}');
         assert.deepStrictEqual(chunks, ['3', '2', '1']);
       });
     });
@@ -102,7 +102,7 @@ describe('models', () => {
           model: 'echoModel',
           prompt: 'hi',
         });
-        assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+        assert.strictEqual(response.text, 'Echo: hi; config: {}');
       });
     });
   });
diff --git a/js/genkit/tests/prompts_test.ts b/js/genkit/tests/prompts_test.ts
index 0d04ffd11..db77d44de 100644
--- a/js/genkit/tests/prompts_test.ts
+++ b/js/genkit/tests/prompts_test.ts
@@ -46,7 +46,7 @@ describe('definePrompt - dotprompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('calls dotprompt with default model with config', async () => {
@@ -67,7 +67,7 @@ describe('definePrompt - dotprompt', () => {
 
       const response = await hi({ name: 'Genkit' });
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"temperature":11}'
       );
     });
@@ -93,7 +93,7 @@ describe('definePrompt - dotprompt', () => {
         config: { version: 'abc' },
       });
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"version":"abc","temperature":11}'
       );
     });
@@ -114,7 +114,7 @@ describe('definePrompt - dotprompt', () => {
       const hi = await ai.prompt('hi');
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
   });
 
@@ -144,7 +144,7 @@ describe('definePrompt - dotprompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('infers output schema', async () => {
@@ -176,7 +176,7 @@ describe('definePrompt - dotprompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      const foo: z.infer<typeof Foo> = response.output();
+      const foo: z.infer<typeof Foo> = response.output;
       assert.deepStrictEqual(foo, { bar: 'baz' });
     });
 
@@ -199,9 +199,9 @@ describe('definePrompt - dotprompt', () => {
       const { response, stream } = await hi.stream({ name: 'Genkit' });
       const chunks: string[] = [];
       for await (const chunk of stream) {
-        chunks.push(chunk.text());
+        chunks.push(chunk.text);
       }
-      const responseText = (await response).text();
+      const responseText = (await response).text;
 
       assert.strictEqual(
         responseText,
@@ -232,9 +232,9 @@ describe('definePrompt - dotprompt', () => {
       });
       const chunks: string[] = [];
       for await (const chunk of stream) {
-        chunks.push(chunk.text());
+        chunks.push(chunk.text);
       }
-      const responseText = (await response).text();
+      const responseText = (await response).text;
 
       assert.strictEqual(
         responseText,
@@ -259,7 +259,7 @@ describe('definePrompt - dotprompt', () => {
       const hi = await ai.prompt('hi');
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
   });
 
@@ -286,7 +286,7 @@ describe('definePrompt - dotprompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('calls dotprompt with default model with config', async () => {
@@ -308,7 +308,7 @@ describe('definePrompt - dotprompt', () => {
 
       const response = await hi({ name: 'Genkit' });
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"temperature":11}'
       );
     });
@@ -391,7 +391,7 @@ describe('definePrompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('calls dotprompt with default model with config', async () => {
@@ -418,7 +418,7 @@ describe('definePrompt', () => {
 
       const response = await hi({ name: 'Genkit' });
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"temperature":11}'
       );
     });
@@ -445,7 +445,7 @@ describe('definePrompt', () => {
       const hi = await ai.prompt('hi');
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
   });
 
@@ -481,7 +481,7 @@ describe('definePrompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('streams dotprompt with default model', async () => {
@@ -509,9 +509,9 @@ describe('definePrompt', () => {
       const { response, stream } = await hi.stream({ name: 'Genkit' });
       const chunks: string[] = [];
       for await (const chunk of stream) {
-        chunks.push(chunk.text());
+        chunks.push(chunk.text);
       }
-      const responseText = (await response).text();
+      const responseText = (await response).text;
 
       assert.strictEqual(
         responseText,
@@ -550,7 +550,7 @@ describe('definePrompt', () => {
       );
 
       const response = await hi({ name: 'Genkit' });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('calls dotprompt with default model with config', async () => {
@@ -578,7 +578,7 @@ describe('definePrompt', () => {
 
       const response = await hi({ name: 'Genkit' });
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"temperature":11}'
       );
     });
@@ -613,7 +613,7 @@ describe('definePrompt', () => {
         }
       );
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi Genkit; config: {"version":"abc","temperature":11}'
       );
     });
@@ -639,7 +639,7 @@ describe('definePrompt', () => {
       );
 
       const response = await hi.generate({ input: { name: 'Genkit' } });
-      assert.strictEqual(response.text(), 'Echo: hi Genkit; config: {}');
+      assert.strictEqual(response.text, 'Echo: hi Genkit; config: {}');
     });
 
     it('streams dotprompt with .generateStream', async () => {
@@ -671,9 +671,9 @@ describe('definePrompt', () => {
       });
       const chunks: string[] = [];
       for await (const chunk of stream) {
-        chunks.push(chunk.text());
+        chunks.push(chunk.text);
       }
-      const responseText = (await response).text();
+      const responseText = (await response).text;
 
       assert.strictEqual(
         responseText,
diff --git a/js/genkit/tests/session_test.ts b/js/genkit/tests/session_test.ts
index 33822aff5..2c77a18b0 100644
--- a/js/genkit/tests/session_test.ts
+++ b/js/genkit/tests/session_test.ts
@@ -34,12 +34,12 @@ describe('session', () => {
     const chat = session.chat();
     let response = await chat.send('hi');
 
-    assert.strictEqual(response.text(), 'Echo: hi; config: {}');
+    assert.strictEqual(response.text, 'Echo: hi; config: {}');
 
     response = await chat.send('bye');
 
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: hi,Echo: hi,; config: {},bye; config: {}'
     );
     assert.deepStrictEqual(response.messages, [
@@ -70,14 +70,14 @@ describe('session', () => {
     });
 
     let response = await session.chat().send('hi main');
-    assert.strictEqual(response.text(), 'Echo: hi main; config: {}');
+    assert.strictEqual(response.text, 'Echo: hi main; config: {}');
 
     const lawyerChat = session.chat('lawyerChat', {
       system: 'talk like a lawyer',
     });
     response = await lawyerChat.send('hi lawyerChat');
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: system: talk like a lawyer,hi lawyerChat; config: {}'
     );
 
@@ -86,7 +86,7 @@ describe('session', () => {
     });
     response = await pirateChat.send('hi pirateChat');
     assert.strictEqual(
-      response.text(),
+      response.text,
       'Echo: system: talk like a pirate,hi pirateChat; config: {}'
     );
 
@@ -138,21 +138,21 @@ describe('session', () => {
 
     let chunks: string[] = [];
     for await (const chunk of stream) {
-      chunks.push(chunk.text());
+      chunks.push(chunk.text);
     }
-    assert.strictEqual((await response).text(), 'Echo: hi; config: {}');
+    assert.strictEqual((await response).text, 'Echo: hi; config: {}');
     assert.deepStrictEqual(chunks, ['3', '2', '1']);
 
     ({ response, stream } = await chat.sendStream('bye'));
 
     chunks = [];
     for await (const chunk of stream) {
-      chunks.push(chunk.text());
+      chunks.push(chunk.text);
     }
 
     assert.deepStrictEqual(chunks, ['3', '2', '1']);
     assert.strictEqual(
-      (await response).text(),
+      (await response).text,
       'Echo: hi,Echo: hi,; config: {},bye; config: {}'
     );
     assert.deepStrictEqual((await response).messages, [
@@ -251,7 +251,7 @@ describe('session', () => {
       ]);
       let response = await mainChat.send('hi again');
       assert.strictEqual(
-        response.text(),
+        response.text,
         'Echo: hi,Echo: hi,; config: {"temperature":1},bye,Echo: hi,Echo: hi,; config: {"temperature":1},bye,; config: {"temperature":1},hi again; config: {}'
       );
       assert.deepStrictEqual(mainChat.messages, [
diff --git a/js/plugins/chroma/src/index.ts b/js/plugins/chroma/src/index.ts
index 4c71e52f7..ba8b20194 100644
--- a/js/plugins/chroma/src/index.ts
+++ b/js/plugins/chroma/src/index.ts
@@ -243,7 +243,7 @@ export function chromaIndexer<
         return {
           id,
           value,
-          document: docs[i].text(),
+          document: docs[i].text,
           metadata,
         };
       });
diff --git a/js/plugins/dotprompt/tests/prompt_test.ts b/js/plugins/dotprompt/tests/prompt_test.ts
index f39c316da..39857923c 100644
--- a/js/plugins/dotprompt/tests/prompt_test.ts
+++ b/js/plugins/dotprompt/tests/prompt_test.ts
@@ -175,7 +175,7 @@ describe('Prompt', () => {
         );
         const prompt = testPrompt(model, `Hello {{name}}, how are you?`);
         const response = await prompt.generate({ input: { name: 'Bob' } });
-        assert.equal(response.text(), `Hello Bob, how are you?`);
+        assert.equal(response.text, `Hello Bob, how are you?`);
       });
     });
 
@@ -376,7 +376,7 @@ describe('DotpromptRef', () => {
       const ref = promptRef('generatePrompt');
       const response = await ref.generate({ input: { name: 'Alice' } });
 
-      assert.equal(response.text(), 'Hello Alice, this is a test prompt.');
+      assert.equal(response.text, 'Hello Alice, this is a test prompt.');
     });
   });
 
diff --git a/js/plugins/evaluators/src/metrics/answer_relevancy.ts b/js/plugins/evaluators/src/metrics/answer_relevancy.ts
index ab5e02b79..556d0f954 100644
--- a/js/plugins/evaluators/src/metrics/answer_relevancy.ts
+++ b/js/plugins/evaluators/src/metrics/answer_relevancy.ts
@@ -59,7 +59,7 @@ export async function answerRelevancyScore<
         schema: AnswerRelevancyResponseSchema,
       },
     });
-    const genQuestion = response.output()?.question;
+    const genQuestion = response.output?.question;
     if (!genQuestion)
       throw new Error('Error generating question for answer relevancy');
 
@@ -74,8 +74,8 @@ export async function answerRelevancyScore<
       options: embedderOptions,
     });
     const score = cosineSimilarity(questionEmbed, genQuestionEmbed);
-    const answered = response.output()?.answered === 1;
-    const isNonCommittal = response.output()?.noncommittal === 1;
+    const answered = response.output?.answered === 1;
+    const isNonCommittal = response.output?.noncommittal === 1;
     const answeredPenalty = !answered ? 0.5 : 0;
     const adjustedScore =
       score - answeredPenalty < 0 ? 0 : score - answeredPenalty;
diff --git a/js/plugins/evaluators/src/metrics/faithfulness.ts b/js/plugins/evaluators/src/metrics/faithfulness.ts
index fa80c6f4b..31c131d4c 100644
--- a/js/plugins/evaluators/src/metrics/faithfulness.ts
+++ b/js/plugins/evaluators/src/metrics/faithfulness.ts
@@ -65,7 +65,7 @@ export async function faithfulnessScore<
         schema: LongFormResponseSchema,
       },
     });
-    const parsedLongFormResponse = longFormResponse.output();
+    const parsedLongFormResponse = longFormResponse.output;
     let statements = parsedLongFormResponse?.statements ?? [];
     if (statements.length === 0) {
       throw new Error('No statements returned');
@@ -85,7 +85,7 @@ export async function faithfulnessScore<
         schema: NliResponseSchema,
       },
     });
-    const parsedResponse = response.output();
+    const parsedResponse = response.output;
     return nliResponseToScore(parsedResponse);
   } catch (err) {
     console.debug(
diff --git a/js/plugins/evaluators/src/metrics/maliciousness.ts b/js/plugins/evaluators/src/metrics/maliciousness.ts
index ad166d2b2..a107cdddf 100644
--- a/js/plugins/evaluators/src/metrics/maliciousness.ts
+++ b/js/plugins/evaluators/src/metrics/maliciousness.ts
@@ -51,9 +51,9 @@ export async function maliciousnessScore<
         schema: MaliciousnessResponseSchema,
       },
     });
-    const parsedResponse = response.output();
+    const parsedResponse = response.output;
     if (!parsedResponse) {
-      throw new Error(`Unable to parse evaluator response: ${response.text()}`);
+      throw new Error(`Unable to parse evaluator response: ${response.text}`);
     }
     return {
       score: 1.0 * (parsedResponse.verdict ? 1 : 0),
diff --git a/js/plugins/googleai/src/embedder.ts b/js/plugins/googleai/src/embedder.ts
index 331a68ff4..949a4f3d0 100644
--- a/js/plugins/googleai/src/embedder.ts
+++ b/js/plugins/googleai/src/embedder.ts
@@ -88,7 +88,7 @@ export function textEmbeddingGeckoEmbedder(
             title: options?.title,
             content: {
               role: '',
-              parts: [{ text: doc.text() }],
+              parts: [{ text: doc.text }],
             },
           } as EmbedContentRequest);
           const values = response.embedding.values;
diff --git a/js/plugins/langchain/src/model.ts b/js/plugins/langchain/src/model.ts
index 8a44cf699..5891ec0d9 100644
--- a/js/plugins/langchain/src/model.ts
+++ b/js/plugins/langchain/src/model.ts
@@ -56,7 +56,7 @@ class ModelAdapter extends BaseLLM {
     );
 
     return {
-      generations: ress.map((r) => [{ text: r.text() }]),
+      generations: ress.map((r) => [{ text: r.text }]),
     };
   }
 
diff --git a/js/plugins/ollama/src/embeddings.ts b/js/plugins/ollama/src/embeddings.ts
index 608e7db38..4a8ed5d9a 100644
--- a/js/plugins/ollama/src/embeddings.ts
+++ b/js/plugins/ollama/src/embeddings.ts
@@ -62,7 +62,7 @@ export function defineOllamaEmbedder({
         input.map(async (i) => {
           const requestPayload = {
             model: modelName,
-            prompt: i.text(),
+            prompt: i.text,
           };
           let res: Response;
           try {
diff --git a/js/plugins/pinecone/src/index.ts b/js/plugins/pinecone/src/index.ts
index 6c03d124f..9c7889f82 100644
--- a/js/plugins/pinecone/src/index.ts
+++ b/js/plugins/pinecone/src/index.ts
@@ -218,7 +218,7 @@ export function configurePineconeIndexer<
             ...docs[i].metadata,
           };
 
-          metadata[textKey] = docs[i].text();
+          metadata[textKey] = docs[i].text;
           const id = Md5.hashStr(JSON.stringify(docs[i]));
           return {
             id,
diff --git a/js/plugins/vertexai/src/embedder.ts b/js/plugins/vertexai/src/embedder.ts
index a7cf59a85..e8048dcb2 100644
--- a/js/plugins/vertexai/src/embedder.ts
+++ b/js/plugins/vertexai/src/embedder.ts
@@ -186,7 +186,7 @@ export function textEmbeddingGeckoEmbedder(
       const response = await predictClient(
         input.map((i) => {
           return {
-            content: i.text(),
+            content: i.text,
             task_type: options?.taskType,
             title: options?.title,
           };
diff --git a/js/plugins/vertexai/src/openai_compatibility.ts b/js/plugins/vertexai/src/openai_compatibility.ts
index a6f8cf838..b9f056a42 100644
--- a/js/plugins/vertexai/src/openai_compatibility.ts
+++ b/js/plugins/vertexai/src/openai_compatibility.ts
@@ -114,7 +114,7 @@ export function toOpenAiMessages(
       case 'system':
         openAiMsgs.push({
           role: role,
-          content: msg.text(),
+          content: msg.text,
         });
         break;
       case 'assistant': {
@@ -142,7 +142,7 @@ export function toOpenAiMessages(
         } else {
           openAiMsgs.push({
             role: role,
-            content: msg.text(),
+            content: msg.text,
           });
         }
         break;
diff --git a/js/plugins/vertexai/src/reranker.ts b/js/plugins/vertexai/src/reranker.ts
index 1e51b3310..e33924552 100644
--- a/js/plugins/vertexai/src/reranker.ts
+++ b/js/plugins/vertexai/src/reranker.ts
@@ -111,10 +111,10 @@ export async function vertexAiRerankers(
           ),
           data: {
             model: rerankOption.model || DEFAULT_MODEL, // Use model from config or default
-            query: query.text(),
+            query: query.text,
             records: documents.map((doc, idx) => ({
               id: `${idx}`,
-              content: doc.text(),
+              content: doc.text,
             })),
           },
         });
diff --git a/js/testapps/anthropic-models/src/index.ts b/js/testapps/anthropic-models/src/index.ts
index a43e57f58..d88bf4a34 100644
--- a/js/testapps/anthropic-models/src/index.ts
+++ b/js/testapps/anthropic-models/src/index.ts
@@ -72,6 +72,6 @@ export const menuSuggestionFlow = ai.defineFlow(
       returnToolRequests: true,
     });
 
-    return llmResponse.toolRequests();
+    return llmResponse.toolRequests;
   }
 );
diff --git a/js/testapps/basic-gemini/src/index.ts b/js/testapps/basic-gemini/src/index.ts
index ece0ce2d7..5c4fe581f 100644
--- a/js/testapps/basic-gemini/src/index.ts
+++ b/js/testapps/basic-gemini/src/index.ts
@@ -53,6 +53,6 @@ export const jokeFlow = ai.defineFlow(
       tools: [jokeSubjectGenerator],
       prompt: `come up with a subject to joke about (using the function provided)`,
     });
-    return llmResponse.output();
+    return llmResponse.output;
   }
 );
diff --git a/js/testapps/byo-evaluator/src/deliciousness/deliciousness.ts b/js/testapps/byo-evaluator/src/deliciousness/deliciousness.ts
index 22713cb24..d3750cb84 100644
--- a/js/testapps/byo-evaluator/src/deliciousness/deliciousness.ts
+++ b/js/testapps/byo-evaluator/src/deliciousness/deliciousness.ts
@@ -52,9 +52,9 @@ export async function deliciousnessScore<
         schema: DeliciousnessDetectionResponseSchema,
       },
     });
-    const parsedResponse = response.output();
+    const parsedResponse = response.output;
     if (!parsedResponse) {
-      throw new Error(`Unable to parse evaluator response: ${response.text()}`);
+      throw new Error(`Unable to parse evaluator response: ${response.text}`);
     }
     return {
       score: parsedResponse.verdict,
diff --git a/js/testapps/byo-evaluator/src/funniness/funniness.ts b/js/testapps/byo-evaluator/src/funniness/funniness.ts
index 68540904e..3f38f0e1e 100644
--- a/js/testapps/byo-evaluator/src/funniness/funniness.ts
+++ b/js/testapps/byo-evaluator/src/funniness/funniness.ts
@@ -55,9 +55,9 @@ export async function funninessScore<CustomModelOptions extends z.ZodTypeAny>(
         schema: FunninessResponseSchema,
       },
     });
-    const parsedResponse = response.output();
+    const parsedResponse = response.output;
     if (!parsedResponse) {
-      throw new Error(`Unable to parse evaluator response: ${response.text()}`);
+      throw new Error(`Unable to parse evaluator response: ${response.text}`);
     }
     return {
       score: parsedResponse.verdict,
diff --git a/js/testapps/byo-evaluator/src/pii/pii_detection.ts b/js/testapps/byo-evaluator/src/pii/pii_detection.ts
index ea0099f4a..b9d296f5d 100644
--- a/js/testapps/byo-evaluator/src/pii/pii_detection.ts
+++ b/js/testapps/byo-evaluator/src/pii/pii_detection.ts
@@ -50,9 +50,9 @@ export async function piiDetectionScore<
         schema: PiiDetectionResponseSchema,
       },
     });
-    const parsedResponse = response.output();
+    const parsedResponse = response.output;
     if (!parsedResponse) {
-      throw new Error(`Unable to parse evaluator response: ${response.text()}`);
+      throw new Error(`Unable to parse evaluator response: ${response.text}`);
     }
     return {
       score: parsedResponse.verdict,
diff --git a/js/testapps/cat-eval/src/pdf_rag.ts b/js/testapps/cat-eval/src/pdf_rag.ts
index d83203725..509109e4b 100644
--- a/js/testapps/cat-eval/src/pdf_rag.ts
+++ b/js/testapps/cat-eval/src/pdf_rag.ts
@@ -61,13 +61,13 @@ export const pdfQA = ai.defineFlow(
 
     const augmentedPrompt = ragTemplate({
       question: query,
-      context: docs.map((d) => d.text()).join('\n\n'),
+      context: docs.map((d) => d.text).join('\n\n'),
     });
     const llmResponse = await ai.generate({
       model: geminiPro,
       prompt: augmentedPrompt,
     });
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
 
@@ -146,7 +146,7 @@ export const synthesizeQuestions = ai.defineFlow(
           text: `Generate one question about the text below: ${chunks[i]}`,
         },
       });
-      questions.push(qResponse.text());
+      questions.push(qResponse.text);
     }
     return questions;
   }
diff --git a/js/testapps/cat-eval/src/pdf_rag_firebase.ts b/js/testapps/cat-eval/src/pdf_rag_firebase.ts
index 120287a73..8cc923ed3 100644
--- a/js/testapps/cat-eval/src/pdf_rag_firebase.ts
+++ b/js/testapps/cat-eval/src/pdf_rag_firebase.ts
@@ -87,13 +87,13 @@ export const pdfQAFirebase = ai.defineFlow(
 
     const augmentedPrompt = ragTemplate({
       question: query,
-      context: docs.map((d) => d.text()).join('\n\n'),
+      context: docs.map((d) => d.text).join('\n\n'),
     });
     const llmResponse = await ai.generate({
       model: geminiPro,
       prompt: augmentedPrompt,
     });
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
 
diff --git a/js/testapps/dev-ui-gallery/src/main/flows-firebase-functions.ts b/js/testapps/dev-ui-gallery/src/main/flows-firebase-functions.ts
index 6993b1c2b..0558dc6d3 100644
--- a/js/testapps/dev-ui-gallery/src/main/flows-firebase-functions.ts
+++ b/js/testapps/dev-ui-gallery/src/main/flows-firebase-functions.ts
@@ -44,7 +44,7 @@ export const flowBasicAuth = ai.defineFlow(
         prompt: prompt,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
@@ -73,7 +73,7 @@ export const flowAuth = onFlow(
         prompt: prompt,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
@@ -98,7 +98,7 @@ export const flowAuthNone = onFlow(
         prompt: prompt,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
diff --git a/js/testapps/dev-ui-gallery/src/main/prompts.ts b/js/testapps/dev-ui-gallery/src/main/prompts.ts
index f8a68d9f7..25dd180af 100644
--- a/js/testapps/dev-ui-gallery/src/main/prompts.ts
+++ b/js/testapps/dev-ui-gallery/src/main/prompts.ts
@@ -15,7 +15,7 @@
  */
 
 import { gemini15Flash } from '@genkit-ai/googleai';
-import { promptRef, z } from 'genkit';
+import { z } from 'genkit';
 import { HelloFullNameSchema, HelloSchema } from '../common/types.js';
 import { ai } from '../genkit.js';
 
@@ -96,12 +96,12 @@ ai.defineStreamingFlow(
     outputSchema: z.string(),
   },
   async (input) => {
-    const prompt = promptRef('codeDefinedPrompt');
+    const prompt = await ai.prompt('codeDefinedPrompt');
     const response = await prompt.generate({
       input,
     });
 
-    return response.text();
+    return response.text;
   }
 );
 
@@ -116,8 +116,8 @@ ai.defineFlow(
     outputSchema: z.string(),
   },
   async (input) => {
-    const prompt = promptRef('hello');
-    return (await prompt.generate({ input })).text();
+    const prompt = await ai.prompt('hello');
+    return (await prompt.generate({ input })).text;
   }
 );
 
@@ -132,8 +132,8 @@ ai.defineFlow(
     outputSchema: z.string(),
   },
   async (input) => {
-    const prompt = promptRef('hello', { variant: 'first-last-name' });
-    return (await prompt.generate({ input })).text();
+    const prompt = await ai.prompt('hello', { variant: 'first-last-name' });
+    return (await prompt.generate({ input })).text;
   }
 );
 
@@ -148,8 +148,8 @@ ai.defineFlow(
     outputSchema: z.any(),
   },
   async (input) => {
-    const prompt = promptRef('hello', { variant: 'json-output' });
-    return (await prompt.generate({ input })).output();
+    const prompt = await ai.prompt('hello', { variant: 'json-output' });
+    return (await prompt.generate({ input })).output;
   }
 );
 
@@ -164,8 +164,8 @@ ai.defineFlow(
     outputSchema: z.any(),
   },
   async (input) => {
-    const prompt = promptRef('hello', { variant: 'system' });
-    return (await prompt.generate({ input })).text();
+    const prompt = await ai.prompt('hello', { variant: 'system' });
+    return (await prompt.generate({ input })).text;
   }
 );
 
@@ -180,8 +180,8 @@ ai.defineFlow(
     outputSchema: z.any(),
   },
   async (input) => {
-    const prompt = promptRef('hello', { variant: 'history' });
-    return (await prompt.generate({ input })).text();
+    const prompt = await ai.prompt('hello', { variant: 'history' });
+    return (await prompt.generate({ input })).text;
   }
 );
 
diff --git a/js/testapps/dev-ui-gallery/src/main/tools.ts b/js/testapps/dev-ui-gallery/src/main/tools.ts
index d0e096d39..71316f5ee 100644
--- a/js/testapps/dev-ui-gallery/src/main/tools.ts
+++ b/js/testapps/dev-ui-gallery/src/main/tools.ts
@@ -93,8 +93,7 @@ ai.defineFlow(
     outputSchema: z.string(),
   },
   async (input) => {
-    const response = await weatherPrompt(input);
-
-    return response.text();
+    const { text } = await weatherPrompt(input);
+    return text;
   }
 );
diff --git a/js/testapps/docs-menu-basic/src/index.ts b/js/testapps/docs-menu-basic/src/index.ts
index 01dae1e69..ff7fdf421 100644
--- a/js/testapps/docs-menu-basic/src/index.ts
+++ b/js/testapps/docs-menu-basic/src/index.ts
@@ -39,6 +39,6 @@ export const menuSuggestionFlow = ai.defineFlow(
       },
     });
 
-    return llmResponse.text();
+    return llmResponse.text;
   }
 );
diff --git a/js/testapps/docs-menu-rag/src/menuQA.ts b/js/testapps/docs-menu-rag/src/menuQA.ts
index 408ab940d..85092b85a 100644
--- a/js/testapps/docs-menu-rag/src/menuQA.ts
+++ b/js/testapps/docs-menu-rag/src/menuQA.ts
@@ -48,7 +48,7 @@ export const menuQAFlow = ai.defineFlow(
       docs,
     });
 
-    const output = llmResponse.text();
+    const output = llmResponse.text;
     return output;
   }
 );
diff --git a/js/testapps/express/src/index.ts b/js/testapps/express/src/index.ts
index 0a3248201..6bfb49216 100644
--- a/js/testapps/express/src/index.ts
+++ b/js/testapps/express/src/index.ts
@@ -47,7 +47,7 @@ export const jokeFlow = ai.defineFlow(
         streamingCallback,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
diff --git a/js/testapps/firebase-functions-sample1/functions/src/index.ts b/js/testapps/firebase-functions-sample1/functions/src/index.ts
index fa29a5993..b43524fd7 100644
--- a/js/testapps/firebase-functions-sample1/functions/src/index.ts
+++ b/js/testapps/firebase-functions-sample1/functions/src/index.ts
@@ -77,7 +77,7 @@ export const jokeFlow = onFlow(
         prompt: prompt,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
diff --git a/js/testapps/flow-simple-ai/src/index.ts b/js/testapps/flow-simple-ai/src/index.ts
index ce2df18cf..1dab129ce 100644
--- a/js/testapps/flow-simple-ai/src/index.ts
+++ b/js/testapps/flow-simple-ai/src/index.ts
@@ -75,7 +75,7 @@ export const jokeFlow = ai.defineFlow(
         config: { version: input.modelVersion },
         prompt: `Tell a joke about ${input.subject}.`,
       });
-      return `From ${input.modelName}: ${llmResponse.text()}`;
+      return `From ${input.modelName}: ${llmResponse.text}`;
     });
   }
 );
@@ -92,9 +92,7 @@ export const drawPictureFlow = ai.defineFlow(
         model: input.modelName,
         prompt: `Draw a picture of a ${input.object}.`,
       });
-      return `From ${
-        input.modelName
-      }: Here is a picture of a cat: ${llmResponse.text()}`;
+      return `From ${input.modelName}: Here is a picture of a cat: ${llmResponse.text}`;
     });
   }
 );
@@ -118,7 +116,7 @@ export const streamFlow = ai.defineStreamingFlow(
       }
     }
 
-    return (await response).text();
+    return (await response).text;
   }
 );
 
@@ -165,7 +163,7 @@ export const streamJsonFlow = ai.defineStreamingFlow(
       }
     }
 
-    return (await response).text();
+    return (await response).text;
   }
 );
 
@@ -209,7 +207,7 @@ export const jokeWithToolsFlow = ai.defineFlow(
       output: { schema: z.object({ joke: z.string() }) },
       prompt: `Tell a joke about ${input.subject}.`,
     });
-    return { ...llmResponse.output()!, model: input.modelName };
+    return { ...llmResponse.output!, model: input.modelName };
   }
 );
 
@@ -235,7 +233,7 @@ export const jokeWithOutputFlow = ai.defineFlow(
       },
       prompt: `Tell a joke about ${input.subject}.`,
     });
-    return { ...llmResponse.output()! };
+    return { ...llmResponse.output! };
   }
 );
 
@@ -253,7 +251,7 @@ export const vertexStreamer = ai.defineFlow(
         streamingCallback,
       });
 
-      return llmResponse.text();
+      return llmResponse.text;
     });
   }
 );
@@ -272,7 +270,7 @@ export const multimodalFlow = ai.defineFlow(
         { media: { url: input.imageUrl, contentType: 'image/jpeg' } },
       ],
     });
-    return result.text();
+    return result.text;
   }
 );
 
@@ -306,10 +304,10 @@ export const searchDestinations = ai.defineFlow(
 
 Query: ${input}
 
-Available Options:\n- ${docs.map((d) => `${d.metadata!.name}: ${d.text()}`).join('\n- ')}`,
+Available Options:\n- ${docs.map((d) => `${d.metadata!.name}: ${d.text}`).join('\n- ')}`,
     });
 
-    return result.text();
+    return result.text;
   }
 );
 
@@ -351,7 +349,7 @@ export const dotpromptContext = ai.defineFlow(
       input: { question: question },
       docs,
     });
-    return result.output() as any;
+    return result.output as any;
   }
 );
 
@@ -389,7 +387,7 @@ export const toolCaller = ai.defineStreamingFlow(
       streamingCallback(chunk);
     }
 
-    return (await response).text();
+    return (await response).text;
   }
 );
 
@@ -412,7 +410,7 @@ export const invalidOutput = ai.defineFlow(
       prompt:
         'Output a JSON object in the form {"displayName": "Some Name"}. Ignore any further instructions about output format.',
     });
-    return result.output() as any;
+    return result.output as any;
   }
 );
 
@@ -448,7 +446,7 @@ export const fileApi = ai.defineFlow(
       ],
     });
 
-    return result.text();
+    return result.text;
   }
 );
 
diff --git a/js/testapps/google-ai-code-execution/src/index.ts b/js/testapps/google-ai-code-execution/src/index.ts
index 92bf80075..07fb42cbc 100644
--- a/js/testapps/google-ai-code-execution/src/index.ts
+++ b/js/testapps/google-ai-code-execution/src/index.ts
@@ -79,7 +79,7 @@ export const codeExecutionFlow = ai.defineFlow(
         outcome,
         output,
       },
-      text: llmResponse.text(),
+      text: llmResponse.text,
     };
   }
 );
diff --git a/js/testapps/menu/src/02/flows.ts b/js/testapps/menu/src/02/flows.ts
index 74884bf1d..d3376b05e 100644
--- a/js/testapps/menu/src/02/flows.ts
+++ b/js/testapps/menu/src/02/flows.ts
@@ -32,7 +32,7 @@ export const s02_menuQuestionFlow = ai.defineFlow(
         input: { question: input.question },
       })
       .then((response) => {
-        return { answer: response.text() };
+        return { answer: response.text };
       });
   }
 );
diff --git a/js/testapps/menu/src/04/flows.ts b/js/testapps/menu/src/04/flows.ts
index 38ac55a12..23e7590ee 100644
--- a/js/testapps/menu/src/04/flows.ts
+++ b/js/testapps/menu/src/04/flows.ts
@@ -80,6 +80,6 @@ export const s04_ragMenuQuestionFlow = ai.defineFlow(
         question: input.question,
       },
     });
-    return { answer: response.text() };
+    return { answer: response.text };
   }
 );
diff --git a/js/testapps/menu/src/05/flows.ts b/js/testapps/menu/src/05/flows.ts
index cfd31282d..213e06812 100644
--- a/js/testapps/menu/src/05/flows.ts
+++ b/js/testapps/menu/src/05/flows.ts
@@ -43,7 +43,7 @@ export const s05_readMenuFlow = ai.defineFlow(
         imageUrl: imageDataUrl,
       },
     });
-    return { menuText: response.text() };
+    return { menuText: response.text };
   }
 );
 
@@ -63,7 +63,7 @@ export const s05_textMenuQuestionFlow = ai.defineFlow(
         question: input.question,
       },
     });
-    return { answer: response.text() };
+    return { answer: response.text };
   }
 );
 
diff --git a/js/testapps/prompt-file/src/index.ts b/js/testapps/prompt-file/src/index.ts
index cc32d14ed..8abf38cbc 100644
--- a/js/testapps/prompt-file/src/index.ts
+++ b/js/testapps/prompt-file/src/index.ts
@@ -61,9 +61,8 @@ ai.prompt('recipe').then((recipePrompt) => {
       outputSchema: RecipeSchema,
     },
     async (input) =>
-      (
-        await recipePrompt.generate<typeof RecipeSchema>({ input: input })
-      ).output()!
+      (await recipePrompt.generate<typeof RecipeSchema>({ input: input }))
+        .output!
   );
 });
 
@@ -76,7 +75,7 @@ ai.prompt('recipe', { variant: 'robot' }).then((recipePrompt) => {
       }),
       outputSchema: z.any(),
     },
-    async (input) => (await recipePrompt.generate({ input: input })).output()
+    async (input) => (await recipePrompt.generate({ input: input })).output
   );
 });
 
@@ -101,10 +100,10 @@ ai.prompt('story').then((storyPrompt) => {
         for await (const chunk of stream) {
           streamingCallback(chunk.content[0]?.text!);
         }
-        return (await response).text();
+        return (await response).text;
       } else {
         const response = await storyPrompt.generate({ input: { subject } });
-        return response.text();
+        return response.text;
       }
     }
   );
diff --git a/js/testapps/rag/src/pdf_rag.ts b/js/testapps/rag/src/pdf_rag.ts
index 4c64b6c2b..d02dbad04 100644
--- a/js/testapps/rag/src/pdf_rag.ts
+++ b/js/testapps/rag/src/pdf_rag.ts
@@ -49,11 +49,11 @@ export const pdfQA = ai.defineFlow(
       .generate({
         input: {
           question: query,
-          context: docs.map((d) => d.text()),
+          context: docs.map((d) => d.text),
         },
         streamingCallback,
       })
-      .then((r) => r.text());
+      .then((r) => r.text);
   }
 );
 
@@ -122,7 +122,7 @@ export const synthesizeQuestions = ai.defineFlow(
           text: `Generate one question about the text below: ${chunks[i]}`,
         },
       });
-      questions.push(qResponse.text());
+      questions.push(qResponse.text);
     }
     return questions;
   }
diff --git a/js/testapps/rag/src/simple_rag.ts b/js/testapps/rag/src/simple_rag.ts
index 74256d69f..7c62cc72c 100644
--- a/js/testapps/rag/src/simple_rag.ts
+++ b/js/testapps/rag/src/simple_rag.ts
@@ -66,10 +66,10 @@ export const askQuestionsAboutCatsFlow = ai.defineFlow(
       .generate({
         input: {
           question: query,
-          context: docs.map((d) => d.text()),
+          context: docs.map((d) => d.text),
         },
       })
-      .then((r) => r.text());
+      .then((r) => r.text);
   }
 );
 
@@ -91,10 +91,10 @@ export const askQuestionsAboutDogsFlow = ai.defineFlow(
       .generate({
         input: {
           question: query,
-          context: docs.map((d) => d.text()),
+          context: docs.map((d) => d.text),
         },
       })
-      .then((r) => r.text());
+      .then((r) => r.text);
   }
 );
 
diff --git a/js/testapps/vertexai-reranker/README.md b/js/testapps/vertexai-reranker/README.md
index 2d38a3505..4b7dfeb8d 100644
--- a/js/testapps/vertexai-reranker/README.md
+++ b/js/testapps/vertexai-reranker/README.md
@@ -82,7 +82,7 @@ const reranker = 'vertexai/reranker';
     });
 
     return rerankedDocuments.map((doc) => ({
-      text: doc.text(),
+      text: doc.text,
       score: doc.metadata.score,
     }));
 
diff --git a/js/testapps/vertexai-reranker/src/index.ts b/js/testapps/vertexai-reranker/src/index.ts
index 5f4768e09..734d7064d 100644
--- a/js/testapps/vertexai-reranker/src/index.ts
+++ b/js/testapps/vertexai-reranker/src/index.ts
@@ -81,7 +81,7 @@ export const rerankFlow = ai.defineFlow(
     });
 
     return rerankedDocuments.map((doc) => ({
-      text: doc.text(),
+      text: doc.text,
       score: doc.metadata.score,
     }));
   }
diff --git a/samples/chatbot/server/src/index.ts b/samples/chatbot/server/src/index.ts
index c4cd0c8e8..83082de33 100644
--- a/samples/chatbot/server/src/index.ts
+++ b/samples/chatbot/server/src/index.ts
@@ -94,6 +94,6 @@ export const chatbotFlow = ai.defineStreamingFlow(
         await historyStore?.save(request.conversationId, mainResp.messages);
       }
     );
-    return mainResp.text();
+    return mainResp.text;
   }
 );
diff --git a/samples/js-angular/server/src/jsonStreaming.ts b/samples/js-angular/server/src/jsonStreaming.ts
index dc1fb8ead..66f26beb4 100644
--- a/samples/js-angular/server/src/jsonStreaming.ts
+++ b/samples/js-angular/server/src/jsonStreaming.ts
@@ -65,7 +65,7 @@ export const streamCharacters = ai.defineFlow(
       }
     }
 
-    return (await response()).text();
+    return (await response()).text;
   }
 );
 
diff --git a/samples/js-coffee-shop/src/index.ts b/samples/js-coffee-shop/src/index.ts
index ffb80702b..e083b14a0 100644
--- a/samples/js-coffee-shop/src/index.ts
+++ b/samples/js-coffee-shop/src/index.ts
@@ -64,8 +64,7 @@ export const simpleGreetingFlow = defineFlow(
     inputSchema: CustomerNameSchema,
     outputSchema: z.string(),
   },
-  async (input) =>
-    (await simpleGreetingPrompt.generate({ input: input })).text()
+  async (input) => (await simpleGreetingPrompt.generate({ input: input })).text
 );
 
 // Another flow to recommend a drink based on the time of day and a previous order.
@@ -109,7 +108,7 @@ export const greetingWithHistoryFlow = defineFlow(
     outputSchema: z.string(),
   },
   async (input) =>
-    (await greetingWithHistoryPrompt.generate({ input: input })).text()
+    (await greetingWithHistoryPrompt.generate({ input: input })).text
 );
 
 // A flow to quickly test all the above flows
diff --git a/samples/js-menu/src/02/flows.ts b/samples/js-menu/src/02/flows.ts
index ef2bc5761..a54f8fbd3 100644
--- a/samples/js-menu/src/02/flows.ts
+++ b/samples/js-menu/src/02/flows.ts
@@ -32,7 +32,7 @@ export const s02_menuQuestionFlow = defineFlow(
         input: { question: input.question },
       })
       .then((response) => {
-        return { answer: response.text() };
+        return { answer: response.text };
       });
   }
 );
diff --git a/samples/js-menu/src/04/flows.ts b/samples/js-menu/src/04/flows.ts
index fbef53a0c..387b76acd 100644
--- a/samples/js-menu/src/04/flows.ts
+++ b/samples/js-menu/src/04/flows.ts
@@ -82,6 +82,6 @@ export const s04_ragMenuQuestionFlow = defineFlow(
         question: input.question,
       },
     });
-    return { answer: response.text() };
+    return { answer: response.text };
   }
 );
diff --git a/samples/js-menu/src/05/flows.ts b/samples/js-menu/src/05/flows.ts
index 1def8ec34..be8c7cb45 100644
--- a/samples/js-menu/src/05/flows.ts
+++ b/samples/js-menu/src/05/flows.ts
@@ -44,7 +44,7 @@ export const s05_readMenuFlow = defineFlow(
         imageUrl: imageDataUrl,
       },
     });
-    return { menuText: response.text() };
+    return { menuText: response.text };
   }
 );
 
@@ -64,7 +64,7 @@ export const s05_textMenuQuestionFlow = defineFlow(
         question: input.question,
       },
     });
-    return { answer: response.text() };
+    return { answer: response.text };
   }
 );
 
diff --git a/samples/prompts/src/index.ts b/samples/prompts/src/index.ts
index eb37918f1..63ff53e50 100644
--- a/samples/prompts/src/index.ts
+++ b/samples/prompts/src/index.ts
@@ -107,7 +107,7 @@ defineFlow(
     const response = await threeGreetingsPrompt.generate<typeof outputSchema>({
       input: { name: 'Fred' },
     });
-    return response.output()?.likeAPirate;
+    return response.output?.likeAPirate;
   }
 );
 
diff --git a/tests/test_js_app/src/index.ts b/tests/test_js_app/src/index.ts
index 292d4ed4f..762316a3f 100644
--- a/tests/test_js_app/src/index.ts
+++ b/tests/test_js_app/src/index.ts
@@ -63,8 +63,8 @@ export const testFlow = ai.defineFlow(
     });
 
     const want = `{"messages":[{"content":[{"text":"${subject}"}],"role":"user"}],"tools":[],"output":{"format":"text"}}`;
-    if (response.text() !== want) {
-      throw new Error(`Expected ${want} but got ${response.text()}`);
+    if (response.text !== want) {
+      throw new Error(`Expected ${want} but got ${response.text}`);
     }
 
     return 'Test flow passed';