> output from LLMs, once published, is essentially in the Public Domain, since there isn't any human who owns it

That’s not what the court case in question was about: https://www.morganlewis.com/pubs/2026/03/us-supreme-court-de...

If I ask an LLM to come up with an entirely new story on its own, the output is not copyrightable.

But if I feed an LLM a Tom Clancy novel and ask it to regurgitate that same novel, I cannot legally then put the output on a website for anyone to download.