docs: add together to deepseek guide as provider option

content/docs/02-guides/04-r1.mdx

@@ -115,6 +115,7 @@ You can use DeepSeek R1 with the AI SDK through various providers. Here's a comp
 | [Fireworks](/providers/ai-sdk-providers/fireworks) | [`accounts/fireworks/models/deepseek-r1`](https://fireworks.ai/models/fireworks/deepseek-r1)                      | Requires Middleware |
 | [Groq](/providers/ai-sdk-providers/groq)           | [`deepseek-r1-distill-llama-70b`](https://huggingface.co/deepseek-ai/DeepSeek-R1-Distill-Llama-70B)               | Requires Middleware |
 | [Azure](/providers/ai-sdk-providers/azure)         | [`DeepSeek-R1`](https://ai.azure.com/explore/models/DeepSeek-R1/version/1/registry/azureml-deepseek#code-samples) | Requires Middleware |
+| [Together AI](/providers/ai-sdk-providers/togetherai)   | [`deepseek-ai/DeepSeek-R1`](https://www.together.ai/models/deepseek-r1)                                           | Requires Middleware |
 
 ### Building Interactive Interfaces
 

content/providers/01-ai-sdk-providers/24-togetherai.mdx

@@ -74,6 +74,24 @@ You can create [Together.ai models](https://docs.together.ai/docs/serverless-mod
 const model = togetherai('google/gemma-2-9b-it');
 ```
 
+
+### Reasoning Models
+
+Together exposes the thinking of `deepseek-ai/DeepSeek-R1` in the generated text using the `<think>` tag.
+You can use the `extractReasoningMiddleware` to extract this reasoning and expose it as a `reasoning` property on the result:
+
+```ts
+import { togetherai } from '@ai-sdk/togetherai';
+import { wrapLanguageModel, extractReasoningMiddleware } from 'ai';
+
+const enhancedModel = wrapLanguageModel({
+  model: togetherai('deepseek-ai/DeepSeek-R1'),
+  middleware: extractReasoningMiddleware({ tagName: 'think' }),
+});
+```
+
+You can then use that enhanced model in functions like `generateText` and `streamText`.
+
 ### Example
 
 You can use Together.ai language models to generate text with the `generateText` function: