Announcement1.5.0
langchain-openai 1.5.0
Release of langchain-openai version 1.5.0 with updates since version 1.4.3.
openaireleaselangchain
LangChain Changelog
LangChain — AI, Developer Tools product updates and releases, tracked on megachangelog.
Feature1.5.6
langchain-anthropic 1.5.6
Release of langchain-anthropic 1.5.6 with support for tool_search_tool_result blocks, enabling improved tool interaction handling with Anthropic models.
anthropictoolslangchainpython
Fix1.5.5
langchain-anthropic 1.5.5
Released version 1.5.5 of langchain-anthropic with a fix for KeyError that occurred when renaming files in Claude file-tool middleware.
anthropicclaudefile-toolsbugfix
Improvement1.3.15
langchain 1.3.15
Bug fixes and improvements across middleware, tool calling, chat models, and structured responses. Notable changes include trace_policy support on AgentMiddleware, fixes to SummarizationMiddleware and ToolRetryMiddleware, and improved state schema handling in tool wrappers.
middlewareagentstoolschat-modelsimprovements
Announcement1.5.4
langchain-core 1.5.4
Release of langchain-core 1.5.4 containing improvements and bug fixes including enhancements to RootModel runnables and various stability updates.
corerunnablesrelease
Announcement1.4.3
langchain-openai 1.4.3
Release of langchain-openai version 1.4.3 with updates including response header inclusion support and related fixes.
openaireleaseapi
Announcement1.4.2
langchain-openai 1.4.2
Release of langchain-openai version 1.4.2 containing fixes and improvements to OpenAI integration, including handling of context window errors and authorization updates.
openaillmreleaseauth
Improvement1.5.4
langchain-anthropic 1.5.4
This release includes updates to tool_choice handling and adds a user_profile_id convenience attribute for improved integration with Anthropic's API.
anthropiclangchaintoolsapi
Update1.5.3
langchain-core 1.5.3
Patch release with LANGSMITH_API_KEY support for gateway configuration.
langchain-coreapi-keygateway
Announcement1.5.3
langchain-anthropic 1.5.3
Release of langchain-anthropic version 1.5.3 with updates and improvements from the previous 1.5.2 release.
langchainanthropicrelease
Announcement1.5.2
langchain-core 1.5.2
Release of langchain-core version 1.5.2 with updates and fixes since 1.5.1.
langchain-corereleasepython
Announcement1.5.2
langchain-fireworks 1.5.2
Release of langchain-fireworks version 1.5.2 with bug fixes and improvements since version 1.5.1.
releasefireworkslangchain
Announcement1.5.2
langchain-anthropic 1.5.2
Release of langchain-anthropic version 1.5.2 with incremental updates since 1.5.1.
anthropicintegrationrelease
Announcement1.4.1
langchain-openai 1.4.1
Release of langchain-openai version 1.4.1 with improvements to the gpt-5.3-chat-latest profile and related updates from upstream changes.
openaireleasellmintegration
Announcement1.5.1
langchain-fireworks 1.5.1 release
Release of langchain-fireworks version 1.5.1 with incremental changes and fixes.
langchainfireworksrelease
Improvement1.5.1
langchain-core 1.5.1
Release of langchain-core 1.5.1 with improvements to tool call schema caching for BaseTool token counting in the count_tokens_approximately method.
langchain-coreperformancetoken-countingtools
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