I have been unsuccessful in trying to use Anthropic’s Claude Opus 4.6, deployed within my Azure AI Foundry project, with the AzureAIChatCompletionsModel. I’ve tried many different combinations of credentials and endpoints to try to get it working but to no avail. Code snippet: chat_completion_llm …

Hi @jacobreesmontgomery , This isn’t a Claude support issue, it’s an endpoint mismatch. You’re pointing to: /anthropic/v1/messages But AzureAIChatCompletionsModel doesn’t work with Anthropic’s native Messages API route. Azure exposes Claude through its Chat Completions API surface, not the /v1/…

I had tried that as well, but that didn’t work either. No matter what api_version I establish, I get this error for that: File "/Users/jacobmontgomery/Documents/ADO Repos/eai-3541975-agent-graph/.venv/lib/python3.12/site-packages/langchain_azure_ai/chat_models/inference.py", line 546, in _generat…

[image] jacobreesmontgomery: AzureAIChatCompletionsModel Yes. Will AzureAIChatCompletionsModel not suffice for working with Claude models in a Foundry project? I would prefer to use existing integrations than introduce custom, dirtier logic for supporting the Claude models.

Good news is that your provided wrapper of the ChatAnthropic integration did work for my Foundry Claude model. However, I’d rather not have have to use this custom logic local to my codebase. Is there any reason this doesn’t reside within the LangChain library itself? It seems worthwhile considering…

Anthropic Support for AzureAIChatCompletionsModel

LangSmith Product Help

pawel-twardziak February 19, 2026, 12:07am 2

hi @jacobreesmontgomery

would that be helpful How to use ChatAnthropic with azure_ad_token_provider? - #4 by pawel-twardziak ?

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Anthropic Support for AzureAIChatCompletionsModel

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