[geocar]

It makes sense: if you use an LLM, you don’t have the copyright so you can’t assign it to the FSF.

[IshKebab]

That's still an open legal question. You can't definitively say you don't have the copyright.

[geocar]

Nonsense. The FSF cannot receive a copyright assignment from someone who does not clearly have the rights. If it is “open” then it is not clear.

Of the two other parties who claim copyright, neither is the submitter; either Facebook (or whoever “made” the model) has it or the persons whose content is in the model has it. Facebook did not assign copyright of the output to the user, and neither did those others.