pyenv install 3.13.1 The compilation logs scrolled past like digital rain. She watched for the flags: --enable-experimental-jit=yes-off was now simply --enable-jit=stable . And there it was: --disable-gil , the quiet destroyer of worlds.
A critical CVE was announced—a use-after-free in the new biased reference counter, only triggerable when mixing subinterpreters and C extensions that manually manipulated PyObject* refcounts. The entire Python security team held an emergency sprint. python 3.13.1 released november 2025
It was the itch of a new point release.
Elena, now a member of the Python Steering Council (she had been elected in December, a decision she still questioned at 3 AM), cast the deciding vote. pyenv install 3
Elena laughed out loud. The sound echoed off the empty office walls. python 3.13.1 released november 2025