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

cohere-ui
4.2.1

This version was deleted from PyPI around 2025-07-23. Installing fails with:
$ pip3 install cohere-ui==4.2.1 ERROR: Could not find a version that satisfies the requirement cohere-ui==4.2.1
View other deleted versions of cohere-ui

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/2025-07-22/ \ cohere-ui==4.2.1
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:
cohere_ui-4.2.1-py2.py3-none-any.whl (154.3KB)
cohere_ui-4.2.1.tar.gz (123.1KB)