Python 3.13.1 Released Oct 2025 ((hot))

Developers testing the --disable-gil build reported race conditions in the asyncio event loop and the weakref module. Version 3.13.1 introduces additional locking primitives and memory barrier instructions, making thread-safe operations more reliable without sacrificing the performance gains of GIL-free execution.

Note: sys._is_gil_enabled() returns True in standard builds and False in the python3.13t builds.

If you rely on obscure C-packages, verify they have wheels for 3.13. python 3.13.1 released oct 2025

It’s been a year since first landed in October 2024, and the ecosystem hasn't slowed down. With the recent release of Python 3.13.8 this month, the "Free-Threaded" era is officially in full swing.

Per the Official Python Release Schedule , Python 3.13 will receive regular bugfix updates until . Following that, it will enter a "security support only" phase until October 2029 , ensuring that mission-critical systems remain safe and stable. If you rely on obscure C-packages, verify they

Python 3.13 introduced the ability to disable the Global Interpreter Lock (GIL).

Look for the "Download Python 3.13.1" link. During installation, check the box for "Enable experimental free-threading mode" if you plan to utilize multi-core parallelism. Per the Official Python Release Schedule , Python 3

For the latest binaries and official documentation, developers should consult the Python Downloads page or track version status on Python | endoflife.date .

Have you tried out the yet, or are you waiting for more library support? Python documentation by version