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

cortex-cli
1.25.0.post6

This version was deleted from PyPI around 2023-10-20. Installing fails with:
$ pip3 install cortex-cli==1.25.0.post6 ERROR: Could not find a version that satisfies the requirement cortex-cli==1.25.0.post6
View other deleted versions of cortex-cli

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/2023-10-19/ \ cortex-cli==1.25.0.post6
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:
cortex_cli-1.25.0.post6-py3-none-any.whl (50.7KB)
cortex_cli-1.25.0.post6.tar.gz (35.8KB)