The Python Software Foundation would like to thank all the contributors, developers, and users who have helped make Python 3.13 a reality. Their hard work, dedication, and passion for the language have made this release possible, and will continue to shape the future of Python.
The headline feature of this release is the stabilization of free-threading. While Python 3.12 introduced the experimental ability to disable the GIL, Python 3.13 introduces the per-interpreter GIL as the default behavior for multi-core scaling. python release 3.13 news november 2025
This move aims to deprecate the complex concurrent.futures boilerplate, making concurrent programming accessible to beginners. The Python Software Foundation would like to thank
To complement free-threading, Python 3.13 introduces the parallel keyword block. This high-level abstraction simplifies the execution of loops across multiple threads. While Python 3
Even with 3.14 on the scene, developers continue to adopt 3.13 for its foundational performance upgrades: Python.orghttps://www.python.org Python Release Python 3.13.3