LangChain

Updates

1. Feature2d ago· GitHub Releases

   langchain-openai==1.6.7

   langchain-openai 1.6.7 adds Azure workload identity discovery, refreshes model profile data, and removes live tests for retired completions models.

2. Integration3d ago· GitHub Releases

   langchain-anthropic==1.7.5

   LangChain Anthropic 1.7.5 adds Claude Sonnet 5.5 compatibility. It also fixes replay serialization so invalid tool calls are represented as tool use.

3. Integration3d ago· GitHub Releases

   langchain-core==1.6.6

   LangChain Core 1.6.6 adds Claude Sonnet 5.5 compatibility and corrects docstring examples that previously failed when copied.

4. Feature4d ago· GitHub Releases

   langchain-fireworks==1.7.0

   LangChain Fireworks 1.7.0 adds prompt caching middleware. It also improves classification of mid-stream read timeouts and refreshes model profile data.

5. Integration4d ago· GitHub Releases

   langchain==1.4.3

   LangChain 1.4.3 adds Bedrock Mantle chat model support and recognizes GPT-6 structured output without profiles. It also fixes invalid agent tool calls and sanitizes cache settings for fallback models.

6. Feature7d ago· GitHub Releases

   langchain-fireworks==1.6.3

   LangChain Fireworks 1.6.3 marks native PDF inputs as unsupported, preserves malformed tool arguments as diagnostic JSON, and refreshes model profile data.

7. Feature8d ago· GitHub Releases

   langchain-core==1.6.5

   LangChain Core 1.6.5 fixes XML buffer string handling by abbreviating long tool IDs. This is a maintenance release following version 1.6.4.

8. Feature8d ago· GitHub Releases

   langchain-openai==1.6.6

   langchain-openai 1.6.6 now raises errors received through the streaming event path instead of potentially leaving them unreported.

9. Feature9d ago· GitHub Releases

   langchain-anthropic==1.7.4

   langchain-anthropic 1.7.4 adds support for changing tools mid-conversation through SystemMessage. It also updates model profiles and fixes an integration test cassette.

10. Feature9d ago· GitHub Releases

    langchain-openai==1.6.5

    langchain-openai 1.6.5 adds support for changing tools mid-conversation through SystemMessage. It also adds profile augmentations for Opus 5.5 and GPT-6.

11. Feature10d ago· GitHub Releases

    langchain-openai==1.6.4

    LangChain released langchain-openai 1.6.4. The update refreshes OpenAI model profile data.

12. Integration10d ago· GitHub Releases

    langchain-fireworks==1.6.2

    LangChain released langchain-fireworks 1.6.2, updating model references used in LLM tests, refreshing model profiles, and bumping several dependencies.

13. Integration10d ago· GitHub Releases

    langchain-deepseek==1.1.1

    LangChain released langchain-deepseek 1.1.1 with compatible minimum OpenAI dependencies, strict-mode routing through DeepSeek’s beta endpoint, and corrected prompt-cache token mapping.

14. Integration10d ago· GitHub Releases

    langchain-openrouter==0.2.9

    LangChain released langchain-openrouter 0.2.9 with refreshed model profile data and an AnyIO dependency update to 4.14.2.

15. Feature11d ago· GitHub Releases

    langchain-openai==1.6.3

    LangChain OpenAI 1.6.3 exposes inferred Responses API routing during initialization and adds support for GPT-6 request constraints. It also updates the anyio dependency.

16. Deprecation11d ago· GitHub Releases

    langchain-core==1.6.4

    LangChain Core 1.6.4 deprecates chat message history and updates its anyio and soupsieve dependencies.

17. Feature12d ago· GitHub Releases

    langchain-typesafe==0.0.1a3

    LangChain released the initial alpha of langchain-typesafe, adding TypeSafeClassifier and experimental AutoModeMiddleware and ModelRouterMiddleware. The release also makes classifier questions invocation-scoped and fixes tracing of usage metadata.

18. Feature14d ago· GitHub Releases

    langchain==1.4.2

    LangChain 1.4.2 fixes human-in-the-loop tool call editing so model-generated tool calls are preserved. It also adds a notice to ToolMessage.

19. News15d ago· GitHub Releases

    langchain-typesafe==0.0.1a2

    Initial release release(typesafe): bump to 0.0.1a2 (#40576) feat(typesafe): experimental `AutoModeMiddleware` (#40545) feat(typesafe): experimental `ModelRouterMiddleware` (#40543) fix(typesafe): trace usage metadata (#40570) feat(typesafe): `TypeSafeClassifier` (#40542)

20. Feature15d ago· GitHub Releases

    langchain-typesafe==0.0.1a1

    LangChain released langchain-typesafe 0.0.1a1, the package’s initial alpha version. It introduces TypeSafeClassifier.

21. Feature16d ago· GitHub Releases

    langchain==1.4.1

    LangChain 1.4.1 fixes preservation of open MCP object arguments and corrects the InterruptOnConfig documentation. It is a patch release following version 1.4.0.

22. Feature21d ago· GitHub Releases

    langchain-core==1.6.3

    LangChain Core 1.6.3 lets gateways override model name and provider metadata used for tracing. The release also adds deprecated-path test coverage and cleans up stale API documentation.

23. Feature22d ago· GitHub Releases

    langchain-anthropic==1.7.2

    LangChain Anthropic 1.7.2 fixes handling of invalid tool-use blocks so they are preserved rather than discarded or altered.

24. Feature23d ago· GitHub Releases

    langchain-openai==1.6.2

    LangChain OpenAI 1.6.2 adds reasoning-effort support for GPT-6 Astra and updates its httpx2 dependency from 2.10.0 to 2.12.0.

25. Integration24d ago· GitHub Releases

    langchain-openai==1.6.1

    langchain-openai 1.6.1 adds async tool and configuration_update support, Azure AD authentication compatibility with OpenAI 3.8, and Responses API routing for gpt-5.6-sol. It also corrects reasoning profiles for GPT-5 models.

26. Feature28d ago· GitHub Releases

    langchain-core==1.6.2

    LangChain Core 1.6.2 adds asynchronous tool support for OpenAI and prevents content mutation in Google GenAI and Amazon Bedrock Converse integrations. It also updates Mistune and Tornado dependencies.

27. Integration29d ago· GitHub Releases

    langchain==1.4.0

    LangChain 1.4.0 adds a langchain.mcp namespace and MCPAdapter, with runnable MCP examples. It also fixes agent tool routing to include the model destination and reduces Anthropic middleware trace inputs.

28. Feature29d ago· GitHub Releases

    langchain-anthropic==1.7.1

    langchain-anthropic 1.7.1 adds support for Claude Fable 5.1 and omits middleware trace inputs to improve performance.

29. FeatureSep 2· GitHub Releases

    langchain==1.4.0a4

    LangChain 1.4.0a4 updates its MCP adapter for FastMCP 4.x, including protocol-aware elicitation and interrupt routing. The alpha also revises MCP tool APIs, metadata, caching controls, and client-group handling.

30. FeatureSep 1· GitHub Releases

    langchain==1.4.0a3

    LangChain 1.4.0a3 introduces the langchain.mcp namespace for adapting FastMCP servers and clients into LangChain tools. It adds tool discovery caching, MCP metadata, single-tool conversion, and LangGraph interrupts for server elicitation requests.

31. FeatureAug 28· GitHub Releases

    langchain==1.4.0a2

    LangChain 1.4.0a2 adds an alpha langchain.mcp adapter that converts MCP servers into tools for create_agent. Built on FastMCP, it supports URLs, local scripts, in-process servers, multi-server configurations, and custom clients through one interface.

32. FeatureAug 27· GitHub Releases

    langchain==1.4.0a1

    LangChain 1.4.0a1 is an initial alpha release focused on MCP adapter behavior, including elicitation types, protocol compatibility across servers, and clearer failures for private FastMCP dependencies.

33. IntegrationAug 27· GitHub Releases

    langchain-fireworks==1.6.1

    LangChain Fireworks 1.6.1 removes reasoning-history blocks and refreshes model profile data for the Fireworks integration.

34. NewsAug 27· GitHub Releases

    langchain==1.3.18

    LangChain 1.3.18 preserves content-block structure during PII middleware redaction and improves indexing for GenAI v1 streaming content.

35. FeatureAug 25· GitHub Releases

    langchain==1.3.17

    LangChain 1.3.17 fixes handling of custom rejection reasons in human-in-the-loop workflows and updates dependencies.

36. FeatureAug 21· GitHub Releases

    langchain-perplexity==1.4.1

    LangChain’s Perplexity package 1.4.1 fixes Responses API message typing, preserves caller-supplied extra_body parameters, and switches to a supported model. The broader release also adds package-version tracing metadata and streaming tool-call validation.

37. IntegrationAug 20· GitHub Releases

    langchain-fireworks==1.6.0

    LangChain’s Fireworks integration 1.6.0 adds document reranking and standard model exceptions. It also filters invalid tool calls, prevents duplicate service-tier parameters, and refreshes model profiles and dependencies.

38. FeatureAug 20· GitHub Releases

    langchain==1.3.16

    LangChain 1.3.16 adds standard model exception types and custom token counters for ContextEditingMiddleware. It also corrects retry handling and repeated schema ordering.

39. IntegrationAug 20· GitHub Releases

    langchain-anthropic==1.6.1

    LangChain’s Anthropic integration 1.6.1 filters invalid tool calls from v1 content. This patch should reduce failures when processing malformed Anthropic tool-call responses.

40. FeatureAug 19· GitHub Releases

    langchain-openai==1.6.0

    LangChain OpenAI 1.6.0 introduces standardized model exception types and clearer errors for unexpected chat response types. The changes should simplify consistent error handling in applications using LangChain model integrations.