Python 3.13.1 Release Notes December 2025 2021 -

The Python development team is thrilled to announce the release of Python 3.13.1, a significant update to the Python 3.13 series. This release, dated December 2025, marks a major milestone in the Python ecosystem, bringing numerous enhancements, optimizations, and new features to improve the development experience.

A preliminary JIT compiler was added, providing a 2% to 9% performance boost in initial tests and setting the stage for future optimizations.

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Python 3.13.1 is a solid iteration of the Python 3.13 series, offering a range of bug fixes, performance improvements, and minor enhancements. As with any new release, users are encouraged to test their applications and report any issues to the Python issue tracker.

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