Python 3.13.3 Released April 2025

Smooth, safe upgrade. Run pip list --outdated afterward to refresh compiled extensions.

If you are citing this release in an academic context, please note that Python point releases (x.y.z) are rarely cited as standalone papers. You should cite the release (October 2024) for feature references, or cite the Python Software Foundation repository generally. python 3.13.3 released april 2025

The release of Python 3.13 marked a seismic shift in the language's architecture. Most notably, it introduced an (PEP 703), allowing the language to run without the Global Interpreter Lock (GIL) . For decades, the GIL prevented true multi-core parallel execution in Python; its removal represents a bold leap toward making Python competitive for compute-heavy, multi-threaded applications. Smooth, safe upgrade