# Prereqs (Ubuntu example) sudo apt-get update && sudo apt-get install -y \ build-essential libssl-dev zlib1g-dev libncurses5-dev \ libncursesw5-dev libreadline-dev libsqlite3-dev wget curl \ libbz2-dev libffi-dev liblzma-dev tk-dev uuid-dev
| Benchmark | 3.13.0 | 3.13.1 | Change | |-----------|--------|--------|--------| | PyPerformance (geometric mean) | 1.00x | 1.04x | +4% | | Regex matching | 102 ms | 98 ms | -4% | | JSON load/dump | 84 ms | 81 ms | -3.5% | | N-body (float heavy) | 352 ms | 312 ms | -11% | python release 3.13.1 december 2025
The copy-and-patch JIT compiler introduced in 3.13.0 received critical fixes for edge cases involving recursion and large closures. Benchmarking shows a for numerically heavy loops compared to 3.13.0, thanks to corrected register allocation in the JIT’s backend. # Prereqs (Ubuntu example) sudo apt-get update &&
The initial feature-heavy release. Python 3.13.1 (December 3, 2024): The first bugfix release. Python 3
The release, which arrived in December 2024 , served as the critical first maintenance update for the groundbreaking Python 3.13 series . While the core features of 3.13—such as the experimental JIT compiler and free-threaded mode—were introduced in October, the December 2025 landscape sees this version as a mature, stable choice for production environments. Key Milestones in the Python 3.13 Lifecycle
Python 3.13 debuted a significantly improved REPL based on PyPy. It features: