The Python Steering Council has posted a
detailed plan for the addition of “free-threaded” (no global
interpreter lock) support into the Python mainline. It will not be a short
process and does not have a guaranteed successful outcome.

Phase I: Experimental phase, which can start immediately, in which
the free-threaded build is enabled through a build-time
option. This should not be the default install anywhere. At least
one major Python release should include this experimental
free-threaded build, to allow third-party packages to test and do
their own experimentation. In this stage we should make it clear
the build is experimental, not supported for “production use”, and
may be reverted.

Source: LWN.net – The path toward a no-GIL Python