python 3.13 most certainly has a GIL, it can just be optionally disabled, and this feature is in experimental status. see https://peps.python.org/pep-0703/
Oh, I thought the experimental state was earlier and that 3.13 was the official no-GIL release. Presumably it's going to eventually drop the GIL entirely (probably Python 4 if there ever is such a thing) but nonetheless I stand corrected, thank you.