Python 3.13.1 Release December 2025 Jun 2026

3.13 introduced an experimental Just-In-Time (JIT) compiler. Instead of interpreting bytecode, the JIT compiles parts of the code into machine instructions at runtime.

nearly 400 bugfixes and critical security patches. Python.org +1 Core Release Highlights The review of this version centers on stabilizing the major architectural shifts introduced in October 2024: Refined Interactive Interpreter (REPL): Users benefit from a vastly improved terminal experience featuring multi-line editing, colorized tracebacks by default, and interactive help prompts. Experimental "Free-Threaded" Mode: This version continues testing the ability to run without the python 3.13.1 release december 2025

The Python Software Foundation is thrilled to announce the release of Python 3.13.1, the latest version of the popular programming language. This release marks a significant milestone in the evolution of Python, bringing with it a host of exciting new features, improvements, and optimizations. Python

The interactive interpreter was completely redesigned based on the PyPy backend. It features multi-line editing, colorized tracebacks, interactive help, and command history by default. Tracking the December 2025 Point Releases Key updates include:

The December release focuses heavily on stability. Key updates include: