I found it helpful to read the steering council's messages on this [1]. From my reading: yes, there is now an "officially supported" build of cPython without a GIL. But while it is "no longer experimental," it's still not the default.
From the SC's list of things that still have to be implemented or stabilized, it really doesn't sound production-ready! Specifically: the ABI is not stabilized yet; the documentation is not written yet; and most importantly, there are not yet "higher-level concurrency primitives that users can use safely and effectively".
As of this release, No-GIL/free threading Python has moved out of the experimental phase and is officially supported in this release. No-GIL Python is not the default for this release (that's potentially the next phase of the project), but running no-GIL/free threading is officially blessed.
