Python 3.13 was officially released on , and it stands as one of the most transformative updates in the language's history. This version marks a major shift by addressing long-standing performance bottlenecks and enhancing the developer experience through a modernized interface.
The most significant change in Python 3.13 is the experimental support for running CPython without the Global Interpreter Lock (GIL). python 313 release notes verified
Python 3.13, released on October 7, 2024 , is a transformative update focused on enhancing developer experience and laying the groundwork for massive performance gains. This "stable" release introduces several highly anticipated, albeit experimental, features that fundamentally change how the language handles concurrency and execution. Key Highlights of Python 3.13 What's New In Python 3.13 — Python 3.14.4 documentation Python 3
For teams supporting older Python versions while using new typing features, typing-extensions version 4.13.2 or higher provides backports of these capabilities. Verified benchmarks, however, reveal the current state of
Verified benchmarks, however, reveal the current state of this trade-off. The free-threaded build comes with a —around 30-40% slower in Python 3.13. This overhead is primarily due to the addition of atomic operations and biased reference counting throughout the interpreter to ensure thread safety without the GIL.
Python 3.13 introduces a major upgrade to the default interactive shell.
Python 3.13 removes several deprecated APIs and introduces new features to the standard library.