Cpython Release November 2025 New -

: This version moved "free-threaded" Python out of the experimental phase. It allows the interpreter to run without a Global Interpreter Lock (GIL), enabling true multi-core parallelism for the first time in CPython's history.

Building upon the experimental foundations of past iterations, Python 3.14 officially supported free-threaded execution. This allowed advanced developers to scale across multiple CPU cores by choosing to disable the Global Interpreter Lock (GIL) altogether. cpython release november 2025 new