2025 2021 | Python 3.13.1 Release Nov

Maintenance releases during this time included critical security patches (such as libexpat upgrades) and hundreds of bug fixes to ensure the 3.13 series remained a reliable choice for production environments. Python 3.13 Release Timeline Summary PEP 719 – Python 3.13 Release Schedule

Python 3.13.1 is a maintenance release that provides several bug fixes, performance improvements, and new features. We encourage all Python developers to upgrade to this latest version to take advantage of the improvements and security updates. python 3.13.1 release nov 2025

Early adopters of 3.13.0 noticed a 5-10% slowdown in small scripts due to additional checks for the JIT build. Python 3.13.1 introduces runtime heuristics to disable JIT setup overhead for scripts running under 0.1 seconds, restoring micro-performance to 3.12 levels for CLI tools. Early adopters of 3