Python 3.13.1 Release November 2025 News ~repack~ -

Small, but signals that no-GIL is moving toward official API status.

In November 2025, Python 3.13.1 serves as the reference implementation for library maintainers. The release includes critical fixes for reference counting in a multi-threaded context, preventing rare race conditions that plagued the early 3.13.0 release. python 3.13.1 release november 2025 news