The Global Interpreter Lock (GIL) can now be disabled in officially supported builds. Benchmarks show that CPU-bound tasks can run 2–3x faster on multi-core systems when using the free-threaded interpreter ( python3.14t ).
To mark the release, the PSF is hosting a on October 8–9, 2025. Developers are encouraged to port their projects, run benchmarks, and share performance gains using the hashtag #Python314 .
Python 3.13 introduced an experimental copy-and-patch JIT compiler. Reviews of 3.14 will likely focus on how much this JIT has evolved. The expectation is that the JIT will move from experimental to a standard (or easily toggled) feature, offering noticeable speedups for long-running scripts.
Python 3.14 focuses on concurrency, developer ergonomics, and performance. Notable additions include: PEP 745 – Python 3.14 Release Schedule