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Python 3.13: Free Threading and a JIT Compiler

Sep 18, 2024 Real Python Python

Real Python's clear-eyed breakdown of the two most consequential changes to CPython in years: an experimental build that makes the GIL optional (real thread-based parallelism for CPU-bound Python, finally) and a JIT compiler that's still early but points at where the interpreter is headed. Neither is production-default yet, and the article is honest about that — it's a guide to what's coming and how to try it, not a victory lap. If you've been telling people "Python doesn't do real threads," read this before you say it again.

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