The new interpreter will run Python programs as much as 5% faster, with no changes to existing code required. A beta of Python 3.14 is due in May.

Python 3.13 introduces a revamped interactive interpreter with streamlined features like multi-line editing, experimental free-threaded mode, alongside the introduction of a Just-in-Time (JIT) compile ...

But there’s a feature unique to the Python edition of Windows that makes it easier to manage multiple installed versions of the Python interpreter—the py launcher.