> Open source does not apply to AI

Isn't that a bit overgeneralized?

There's more than weights for the Olmo models for example: https://allenai.org/olmo

Similar for Nvidia's Nemotron models IIRC.

Artificial Analysis has an "openness" ranking: [1]

[1] https://artificialanalysis.ai/models?model-filters=open-sour...