Python 3.15.0 was released on October 9, 2026, featuring over 5,600 commits from 1,012 contributors. Major highlights include UTF-8 as the default encoding, explicit lazy imports, a frozendict built-in, upgraded experimental JIT compiler with up to 12% speedup, new typing features, and free-threaded builds now default on macOS.
Background
Python 3.15 continues the rapid evolution of the Python language, following the incremental release cadence established in recent years. The introduction of free-threaded builds and JIT improvements signal a significant shift in Python's runtime performance strategy.
- Source
- Lobsters
- Published
- Oct 10, 2026 at 01:07 AM
- Score
- 8.0 / 10