Builds and Functions now support Python 3.13 and Python 3.14 alongside the previously supported Python 3.12. Projects without a specified Python version continue using Python 3.12 by default.
The default will switch to Python 3.14 in the coming months. To continue using Python 3.12, specify an upper bound in your project manifest (pyproject.toml or Pipfile) as shown in the examples below.
See the Python documentation to learn more about Python support on Vercel.