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

codex
1.6.18

This version was deleted from PyPI around 2026-04-09. Installing fails with:
$ pip3 install codex==1.6.18 ERROR: Could not find a version that satisfies the requirement codex==1.6.18
View other deleted versions of codex

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/2026-04-08/ \ codex==1.6.18
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Or, download files manually

And install manually via pip:
codex-1.6.18-py3-none-any.whl (18.0MB)
codex-1.6.18.tar.gz (17.8MB)