langchain-core

langchain-ai/langchain

Core Python package in the LangChain ecosystemready

langchain-core is the core package that provides LangChain's common abstractions and fundamental execution components, serving as the foundation for developing LLM applications and agents. Since both developers using LangChain itself and those maintaining higher-level packages and integration libraries depend on this package, its releases directly impact API compatibility and overall ecosystem stability.

langchainlangchain-corepythonllmagentsframework

Choose version

1.7.51w ago

langchain-core langchain-core==1.7.5

Original

Key point

langchain-core 1.7.5 adds standardization of model refusal content blocks and translation of Gemini safety blocks, and fixes tool execution termination on cancellation and LangChain.js serialization compatibility.

Details

New features: Standardized model refusal content blocks and added support for translating Gemini safety blocks into refusal content blocks.
Bug fixes: Fixed an issue so that tool runs terminate correctly when a task is cancelled.
Compatibility fixes: Fixed an issue so that RemoveMessage objects serialized in LangChain.js are loaded correctly.

langchain-core releases | AI Briefing