Claude refuses to translate lyrics of songs even if it's just for your own understanding. ChatGPT allows it.

Also, Suno is so restrictive that it won't make songs of public domain 19th century poems because someone else already made a song and the lyrics are in their song database. And it won't do covers of your own uploaded humming of a novel melody because it matches "humming in an empty room" to some song fingerprint in the database.

They are all trying to avoid these lawsuits by being ridiculously overly cautious. "Your honor, look how much we went above and beyond, even when it made the product worse for legitimate use cases"