LLMs are not human, so they can't violate licenses. Licenses are for humans to adhere to (or not).

However, the intent to reverse engineer without source--only public API and analysis of data streams--for commercial use almost certainly violates OSS, since it's to evade strictures.

Private use like retrocomputing, "right to repair," should support the individual.

Basically, if LLM's output is relicensed for different intent, courts should see through that.