wth? The definitions used in this article for "open source" and "open weight" are wrong.
"Open Source" models have the Source Code, training data and model weights licensed under an Open Source license. Like all Open Source Software, you can modify the source code to create a new version of the software/model (after re-running the training data to create new weights.)
"Open weight" models keep the Source Code and training data secret. Only the model weights are available via an Open Source license. To repeat the weights are the only thing available for free under a license. So you can't modify the model to create a new version.
These aren't my definitions. They are the actual definitions. The defintions in this article appear to be made up (maybe "hallucinated"?)
Sources for actual definitions:
I suspect none of the models mentioned in this article are Open Source. And Hugging Face doesn't have an easy way to filter true Open Source AI models from Open Weight models (If I'm wrong please post a link so I can see how to use the filter.)