Python 3.15 now available as a Vercel Managed Image

Python 3.15 is now available as a Vercel Managed Image for Vercel Sandbox.

To start a sandbox on it, set the image option to vercel/sandbox/python:3.15 in the SDK, or pass --image in the CLI. In the SDK example, Sandbox.create({ image: 'vercel/sandbox/python:3.15' }) is followed by runCommand('python', ['--version']) to print the version. Vercel's image docs list the python managed images as including pip, venv, and uv.

The default image, vercel/sandbox/universal:latest, still ships Python 3.14. Vercel plans to switch it to Python 3.15 on December 16, 2026. If you want to stay on 3.14 after that, pin the 3.14 image or a digest.