News November 2025: Python Release 3.13

Under the updated PEP 602 cycle, Python 3.13 will receive full bugfix support for two years (until late 2026) before moving to security-only updates. Key Performance Pillars Still Driving Adoption

Python 3.13 introduced a (PEP 744). Python Release Python 3.13.1 python release 3.13 news november 2025

Continuing the efforts to trim the "batteries included" philosophy, tkinter and turtle have been moved to the Python Package Index (PyPI) as standalone libraries. This reduces the core installation footprint by 20%. In their place, Python 3.13 introduces a new, modern HTTP client library, httpx (backported and integrated), replacing the aging urllib stack with native async support. Under the updated PEP 602 cycle, Python 3

Python Software Foundation Communications Team press@python.org www.python.org This reduces the core installation footprint by 20%

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 3.13 is now available for download from the official Python website. The new version can be installed on Windows, macOS, and Linux platforms, and is compatible with a wide range of existing Python packages and libraries.

Earlier releases (specifically 3.13.1) faced revoked code-signing certificates on Windows due to security concerns, with later versions in late 2025 being the recommended stable path. White Paper: The Evolution of CPython 3.13 in 2025 Abstract