Python 3.13.3 Released April 2025 Jun 2026

Beyond performance, Python 3.13.3 benefits from a suite of quality-of-life improvements that define the 3.13 era:

Python 3.13.3, released on , stands as a critical maintenance update in the lifecycle of one of the world's most popular programming languages. While maintenance releases like 3.13.3 primarily focus on stability, they are the essential vehicles that deliver the groundbreaking experimental features introduced in the 3.13 series—such as the removal of the Global Interpreter Lock (GIL) and the new JIT compiler—into the hands of developers worldwide. The Evolution Toward High Performance python 3.13.3 released april 2025

This release is recommended for all production environments currently running Python 3.13, as it addresses several regressions identified in the earlier 3.13.0–3.13.2 cycle and resolves potential memory leak issues within the new sub-interpreter implementation. Beyond performance, Python 3

Smooth, safe upgrade. Run pip list --outdated afterward to refresh compiled extensions. Smooth, safe upgrade

: Important fixes for vulnerabilities, such as tarfile extraction filter bypasses (CVE-2024-12718) and memory-related issues in ipaddress and "unicode-escape" decoders.

April 8, 2025 Status: Maintenance/Stable Security Content: High

Python 3.13.3 is a drop-in replacement for Python 3.13.0–3.13.2. Users are encouraged to upgrade immediately.