The event loop has been optimized, reducing overhead by up to 15% for high-load asynchronous applications.
Or download the installer directly from python.org . python 3.13 released news 2025 november
Python 3.13 also serves as the robust foundation for the experimental "free-threaded" build. While the Global Interpreter Lock (GIL) is not entirely gone by default in this version, the infrastructure for has been stabilized. The event loop has been optimized, reducing overhead