Python 3.13.1 Released Dec — 2025

And what a patch it was.

December 3, 2025 – Brussels, Belgium

“In the past, a December patch would have been risky,” said Vance, sipping a lukewarm mug of glögg. “But we designed 3.13 to be patchable . The JIT, the no-GIL mode… they’re modular. 3.13.1 proves we can move fast and fix things fast without breaking the 2,000,000 packages on PyPI.” python 3.13.1 released dec 2025