Following a last minute delay due to a performance regression , Python 3.13 stable is out today as the annual major feature release to this widely-used scripting language implementation.

Python 3.13 boasts a new interactive interpreter, removing the GIL in the experimental free-threaded build mode, an experimental JIT for faster performance, WASI is now a Tier-2 supported platform, and Android and iOS have been promoted to Tier-3 supported platforms. Python 3.13 also adds support for type defaults in type parameters, a new type narrowing annotation, and other new annotations.

Downloads and more information on the exciting Python 3.13 feature release via Python.org .