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

tf-keras
2.14.0

This version was deleted from PyPI around 2023-09-29. Installing fails with:
$ pip3 install tf-keras==2.14.0 ERROR: Could not find a version that satisfies the requirement tf-keras==2.14.0
View other deleted versions of tf-keras

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/2023-09-28/ \ tf-keras==2.14.0
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Or, download files manually

And install manually via pip:
tf_keras-2.14.0-py3-none-any.whl (1.6MB)
tf_keras-2.14.0.tar.gz (1.2MB)