November 2025 officially marked the for Python 3.9.
Every November, the core developers release an internal memo called "Performance of the Next Release." In 2025, the numbers are impressive. cpython release november 2025 new
, which officially debuted on October 7, 2025. This release, nicknamed "Pi" due to its version number, highlights a major performance leap with a new experimental tail-call interpreter that can improve speed by 20–30%. Key Highlights for November 2025 Python 3.14 Stable Release : The first maintenance updates, Python 3.14.1 (Dec 2) and November 2025 officially marked the for Python 3
So a would almost certainly be Python 3.14.0 (or possibly a bugfix release like 3.14.1, though those usually come a month or two after the initial release). the numbers are impressive.