diff --git a/content/providers/01-ai-sdk-providers/08-amazon-bedrock.mdx b/content/providers/01-ai-sdk-providers/08-amazon-bedrock.mdx
index 7e7a36893eba..7e2ab4425d16 100644
--- a/content/providers/01-ai-sdk-providers/08-amazon-bedrock.mdx
+++ b/content/providers/01-ai-sdk-providers/08-amazon-bedrock.mdx
@@ -121,8 +121,11 @@ You can use the following optional settings to customize the Amazon Bedrock prov
 
 - **sessionToken** _string_
 
-  Optional. The AWS session token that you want to use for the API calls.
-  It uses the `AWS_SESSION_TOKEN` environment variable by default.
+  Optional. The AWS session token that you want to use for the API calls. Note
+  this does **not** use the `AWS_SESSION_TOKEN` environment variable by default.
+  That variable is sometimes pre-populated with alternate credentials, e.g. when
+  running within an AWS serverless function, and so default use risks
+  conflicting in a non-obvious manner with any other credential settings.
 
 - **bedrockOptions** _object_
 
@@ -135,7 +138,7 @@ You can use the following optional settings to customize the Amazon Bedrock prov
   - **credentials** _object_
     The AWS credentials that you want to use for the API calls.
 
-  When `bedrockOptions` are provided, the `region`, `accessKeyId`, and `secretAccessKey` settings are ignored.
+  When `bedrockOptions` are provided, the `region`, `accessKeyId`, `secretAccessKey`, and `sessionToken` settings are ignored.
 
 ## Language Models
 
diff --git a/packages/amazon-bedrock/src/bedrock-provider.ts b/packages/amazon-bedrock/src/bedrock-provider.ts
index 884c0414acb8..013d80b512a5 100644
--- a/packages/amazon-bedrock/src/bedrock-provider.ts
+++ b/packages/amazon-bedrock/src/bedrock-provider.ts
@@ -3,11 +3,7 @@ import {
   NoSuchModelError,
   ProviderV1,
 } from '@ai-sdk/provider';
-import {
-  generateId,
-  loadOptionalSetting,
-  loadSetting,
-} from '@ai-sdk/provider-utils';
+import { generateId, loadSetting } from '@ai-sdk/provider-utils';
 import {
   BedrockRuntimeClient,
   BedrockRuntimeClientConfig,
@@ -75,10 +71,10 @@ export function createAmazonBedrock(
             environmentVariableName: 'AWS_SECRET_ACCESS_KEY',
             description: 'AWS secret access key',
           }),
-          sessionToken: loadOptionalSetting({
-            settingValue: options.sessionToken,
-            environmentVariableName: 'AWS_SESSION_TOKEN',
-          }),
+          // Note we don't use `AWS_SESSION_TOKEN` as a default fallback here
+          // because in some cases e.g. AWS serverless functions it can be
+          // pre-populated with conflicting credentials.
+          sessionToken: options.sessionToken,
         },
       },
     );