Python Release November 2025 ((top)) Here

Developers in November focused on experimenting with the breakthrough features of the then-new 3.14 stable release:

If you had told a Python developer five years ago that the language would soon drop its Global Interpreter Lock (GIL) while simultaneously freezing its syntax for a year, they would have laughed you out of the room. Yet, that is exactly what the Python Steering Council delivered this week with the release of . python release november 2025

| Release | Bugfix count (critical) | Security patches | Days after .0 | |---------|------------------------|------------------|----------------| | 3.12.1 (Nov 2023) | 47 | 3 | 31 | | 3.11.1 (Nov 2022) | 52 | 2 | 28 | | 3.10.1 (Nov 2021) | 39 | 1 | 27 | | | ~45 (projected) | 2–4 | ~28 | Developers in November focused on experimenting with the

No intentional performance changes are introduced in a .1 release. However, some bugfixes may indirectly affect speed: However, some bugfixes may indirectly affect speed: |

| Change | Effect on benchmark | |--------|----------------------| | Fix reference leak in @dataclass | +0.1% memory stability, no runtime change | | Optimize re engine backtracking for malformed patterns | +3–5% for pathological inputs | | Disable broken vectorcall optimization on PyPy | -0% (PyPy-only) |

For decades, the GIL was Python’s Achilles' heel. It prevented the language from executing multiple threads at once in a single process, forcing developers to rely on multi-processing or asynchronous workarounds to utilize multi-core CPUs.