LangChain will drop Python 3.10 in langchain-core 1.8.0 and langchain 1.5.0 (November 2, 2026)

What changed

The langchain-core 1.7.4 release notes, published on November 2, 2026, say Python 3.10 support will be dropped in langchain-core 1.8.0 and langchain 1.5.0. The current minor versions are the last to support Python 3.10. LangChain asks users to upgrade to Python 3.11 or later. The langchain 1.4.8 release notes carry the same warning.

Today's packages still install on Python 3.10: langchain 1.4.9 and langchain-anthropic 1.7.10 on PyPI both require Python 3.10 or newer.

Prerequisites

• A Python app that uses langchain or langchain-core
• No API key is needed for this change

Steps

1. Check your Python version with python --version.
2. If it is 3.10, plan a move to Python 3.11 or later before you upgrade to langchain-core 1.8.0 or langchain 1.5.0.
3. Until then, pin below those versions, for example langchain-core<1.8.0 and langchain<1.5.0.
4. Update your CI, Docker images and deploy runtimes at the same time.

Test it

Create a fresh Python 3.11 environment, run pip install -U langchain, and run your test suite.

Not confirmed

• The release notes give no date for langchain-core 1.8.0 or langchain 1.5.0.
• Whether provider packages such as langchain-anthropic drop Python 3.10 at the same time.
• The pins in step 3 are a suggestion, not a step from LangChain's notes.