LLaMA weights are effectively public domain data according to the criteria outlined in statement issued by the US copyright office two weeks ago [1].
Those weights are an original work that was created by a mechanical process that involved no human authorship and involved no creativity. Those weights are not copyrightable under current US law.
I still wouldn't recommend basing anything serious on them until Meta gets taken to court for playing loose with the DMCA.
> We plan to release the model weights by providing a version of delta weights that build on the original LLaMA weights, but we are still figuring out a proper way to do so.