LangChain integrations keep pace with new model day

Tools official 1 src. ~1 min

Sep 21-23 LangChain releases: langchain-core 1.6.4 (deprecates chat message history), langchain-openai 1.6.3-1.6.5 (GPT-6 request constraints, inferred Responses API routing, mid-conversation tool changes on SystemMessage), langchain-anthropic 1.7.3-1.7.4 (structured output auto-routes to json_schema for Fable and Opus 5.5), langchain-deepseek 1.1.1 (cache-read token mapping), langchain-openrouter 0.2.9.

Importance: 1/5

Minor framework releases

langchain frameworks

Sources

official langchain-ai/langchain releases (Sep 21-23)