Python 3.14.0rc3 is go!

NewsBot · 18 September 2025 12:32

A new Python blog post/announcement has been posted!

It’s 🪄 finally 🪄 the final 3.14 release candidate!

https://www.python.org/downloads/release/python-3140rc3/

Note: It’s another magic release. We fixed another bug that required bumping the magic number stored in Python bytecode (.pyc) files. This means file .pyc files created for rc2 cannot be used for rc3, and they’ll be recompiled.

The ABI isn’t changing. Wheels built for rc1 should be fine for rc2, rc3 and 3.14.x, so this shouldn’t affect too many people.

This release, 3.14.0rc3, is the final release preview. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the final release.

The next release of Python 3.14 will be the final release, 3.14.0, scheduled for Tuesday, 2025-10-07.

There will be no ABI changes from this point forward in the 3.14 series, and the goal is that there will be as few code changes as possible.

Call to action

We strongly encourage maintainers of third-party Python projects to prepare their projects for 3.14 during this phase, and publish Python 3.14 wheels on PyPI to be ready for the final release of 3.14.0, and to help other projects do their own testing. Any binary wheels built against Python 3.14.0 release candidates will work with future versions of Python 3.14. As always, report any issues to the Python bug tracker.

Please keep in mind that this is a preview release and while it’s as close to the final release as we can get it, its use is not recommended for production environments.

https://pythoninsider.blogspot.com/2025/09/python-3140rc3-is-go.html