You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

mentat-ng
2.13.2rc0

This version was deleted from PyPI around 2026-02-17. Installing fails with:
$ pip3 install mentat-ng==2.13.2rc0 ERROR: Could not find a version that satisfies the requirement mentat-ng==2.13.2rc0
View other deleted versions of mentat-ng

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2026-02-16/ \ mentat-ng==2.13.2rc0
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
mentat_ng-2.13.2rc0-py3-none-any.whl (36.5MB)
mentat_ng-2.13.2rc0.tar.gz (34.1MB)