Python 3.13.1 Released November 2025 Jun 2026

A major step toward removing the Global Interpreter Lock (GIL) , allowing threads to run concurrently on multi-core processors.

She wrote the script using the new interpreters module—no more _xxsubinterpreters hackery. python 3.13.1 released november 2025

While 3.13.1 is a patch release, it inherits the heavy lifting of the base version. Users on 3.13.1 benefit from: A major step toward removing the Global Interpreter

: This mode allows multiple threads to execute Python code concurrently on different CPU cores, a feature long requested for heavy data processing and machine learning tasks. no GIL handoff

Until November 2025.

results = [f.result() for f in futures] # True parallelism, no GIL handoff