langchain 1.5.0 drops support for Python 3.10, which has reached end-of-life. The minimum supported version is now Python 3.11, and the minimum langchain-core version is now 1.8.0. Users on Python 3.10 will continue to resolve langchain 1.4.x.
Changes since langchain==1.4.10
release(langchain): 1.5.0 (#41798)
fix(langchain): mark ModelRouterMiddleware as beta (#41797)
feat(langchain): Remove EOL'd Python 3.10 from langchain_v1 (#41301)
feat(langchain): add model router and auto mode middleware (#41766)
docs(langchain): explain Baseten minimum version (#41777)