langchain langchain-core==1.8.0

Version 1.8.0 of langchain-core, the package that holds the shared building blocks of the LangChain framework for building applications on language models, no longer supports Python 3.10 (release notes). Python 3.10 has reached end-of-life, the point after which its maintainers stop releasing fixes for it, so the minimum supported version is now Python 3.11.

Nothing breaks immediately for projects still on Python 3.10. The release notes say installers on Python 3.10 will keep resolving the 1.7.x series. That works because the package declares which Python versions it supports and the installer picks the newest release that fits. The cost is that 1.8.0 and later releases will not install in those environments, so a team that wants them has to move to Python 3.11 or newer first.

The only other listed feature adds what the notes call decision models. The pull request describes them as a base class and related types ported into langchain-core from a separate langchain-typesafe package; the release notes do not explain how they are meant to be used.