The global interpreter lock (GIL) has been a part of CPython since the
beginning—nearly—but
that seems likely to change over the next five or so
years. As we described last week, the
Python steering council has announced
its intention to start moving toward a no-GIL
CPython, potentially as soon as Python 3.13 in October 2024
for the preliminaries. The no-GIL version of CPython comes from Sam
Gross, who introduced
it as a proof-of-concept nearly two years
ago; now, the idea has been formalized in a Python Enhancement Proposal
(PEP) that describes no-GIL mode and how it interacts with the rest of the
Python ecosystem.

Source: LWN.net – [$] CPython without a global interpreter lock