Python 3.15.0 added to actions/python-versions

Brief overview

GitHub Actions supports adding Python 3.15.0 to the test matrix, allowing users to run tests for the new Python 3.15.0 version in GitHub Actions.

Article

10th October 2026 - Link Blog

Python 3.15.0 added to actions/python-versions. Bit of a niche link, but I've been waiting for this for a couple of days - I even told ChatGPT to check for it:

Clone https://github.com/actions/python-versions and git pull once an hour until they add the stable 3.15 - then tell me about it

Now that this has landed, you can add "3.15" to a GitHub Actions testing matrix to run tests against the new Python 3.15.0 release.

Source: Simon Willison · simonwillison.net