Python 3.13 News November 2025 [2021] Jun 2026

python3.13 -X warn_default_encoding your_script.py

As of November 2025, the Python ecosystem has undergone one of its most significant transformations in recent history. With the stable release of Python 3.13 now celebrating its first anniversary and the imminent feature freeze of Python 3.14, the community is fully adapting to two paradigm-shifting changes: the experimental Just-In-Time (JIT) compiler and the Free-Threaded build (PEP 703). This paper outlines the current state of CPython, adoption rates, and the performance benchmarks observed in production environments over the last year. python 3.13 news november 2025

While 3.13 is the current stable king, the November 2025 developer blogs are buzzing with the third alpha of Python 3.14. python3

# Before 3.13: ~4.5 sec # After 3.13 with JIT: ~3.2 sec def compute(): total = 0 for i in range(50_000_000): total += i return total While 3

Status: Enabled by default on x86-64 and ARM64

The "bracketed paste" mode has been refined this month to handle larger blocks of code without the indentation errors that plagued older versions. Breaking Changes and Deprecations