While 3.13.1 still maintains the abi4 stability tag, this release focuses on .
If you were waiting for the JIT to "settle," 3.13.1 is the green light. You should see a 10-25% speedup in pure Python workloads without changing a single line of code. python 3.13.1 release news december 2025
Here is your guide to the features, fixes, and future-proofing in this release. While 3
