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Python 3.13 News December 2025 ((exclusive)) -

The PSF recommends that developers target starting January 2026, especially if they use typing features or want to future-proof for no-GIL.

Hundreds of minor bug fixes and build improvements to ensure compatibility across diverse operating systems. python 3.13 news december 2025

# Python 3.12: # NameError: name 'x' is not defined The PSF recommends that developers target starting January

Happy coding from the Python community. See you at PyCon 2026 in Pittsburgh! which still default to 3.11.

With 3.13 stable, all eyes are now on the alpha releases of , scheduled for final release in October 2026.

Among cloud providers, AWS Lambda added official 3.13 runtime in June 2025, and Google App Engine followed in September. The largest holdout is certain enterprise Linux distributions (e.g., RHEL 9), which still default to 3.11.