Python 313 Release Notes Verified Instant

python -q # Quiet mode, then try: >>> def foo(): ... print("Hello") # note syntax highlighting ... >>> [key for key in range(5)] # multiline editing works

stands as one of the most monumental shifts in the language's modern history, introducing core architectural transformations that pave the way for a highly performant, multi-threaded future. Verified through the official Python Software Foundation Core Documentation , this release delivers long-awaited features like a revamped interactive REPL , an experimental free-threaded mode (removing the GIL) , a preliminary Just-In-Time (JIT) compiler , and critical standard library housecleaning . 1. The Headliner: Free-Threaded CPython (PEP 703)

The sys._is_gil_disabled() function returns True only if CPython was compiled with --disable-gil . The GIL remains enabled unless explicitly compiled otherwise. python 313 release notes verified

Yes, upgrade today. The new REPL, incremental GC, and typing improvements are stable, useful, and backward-compatible. The performance gains are free.

, and community-verified packages are available on platforms like Chocolatey What's New In Python 3.13 — Python 3.14.4 documentation python -q # Quiet mode, then try: >>> def foo():

To lay the groundwork for significant future performance improvements.

If you want, I can:

Scheduled to receive bugfix updates until approximately October 2026.