The Python development team would like to thank all contributors, users, and organizations that have supported the development of Python 3.13.1. Their efforts have made this release possible, and we are grateful for their involvement.
Python 3.13, released in October 2024, was described by the Python Software Foundation (PSF) as one of the most significant structural changes in the language's history. It introduced a preliminary JIT compiler and an experimental build mode that disabled the Global Interpreter Lock (GIL), allowing true parallelism via native threads. python release 3.13.1 news november 2025
This experimental mode allows developers to run Python without the Global Interpreter Lock (GIL), enabling true multi-core parallel execution. By late 2025, many popular libraries have updated their C-extensions to support this new ABI. The Python development team would like to thank
Python 3.13.1 includes numerous bug fixes and changes to ensure a more stable and reliable Python environment: It introduced a preliminary JIT compiler and an
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