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

xllm
0.3.20

This version was deleted from PyPI around 2023-10-14. Installing fails with:
$ pip3 install xllm==0.3.20 ERROR: Could not find a version that satisfies the requirement xllm==0.3.20
View other deleted versions of xllm

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/2023-10-13/ \ xllm==0.3.20
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Or, download files manually

And install manually via pip:
xllm-0.3.20-py3-none-any.whl (60.2KB)
xllm-0.3.20.tar.gz (40.2KB)