Python 3.13 and 3.14 are now available

Source: Vercel Blog

Python 3.13 and 3.14 Now Supported

• Builds and Functions now support Python 3.13 and Python 3.14, in addition to the previously supported Python 3.12.
• Projects that do not specify a Python version will continue to use Python 3.12 by default.

Upcoming default version change

• The default Python version will switch to Python 3.14 in the coming months.

How to keep using Python 3.12

• To continue using Python 3.12 after the default changes, explicitly specify an upper version bound (e.g., python_version = ">=3.12,<3.13").

Note: The original announcement may contain additional details beyond this excerpt.