Their models, all of them. This has been shown repeatedly when models can return, verbatim, copyrighted material when asked. New York Times is suing over this.

It would be like if I sold you a pizza, but when you opened the box it contained all the source code for the latest GTA. The pizza wasn't copyrighted by anyone, but the what was inside the box was.

https://www.hsfkramer.com/notes/ip/2025-11/munich-court-find...

Song lyrics for example