Title is misleading. The ruling said training on books is fair use. What got them in trouble was grabbing the books from LibGen instead of just buying them, which is a pretty dumb way to lose $1.5B. If I torrented half a million books I'd be getting a lot more than a $3k-per-book settlement.
Thanks, I’ve changed the submission title from the author’s original.
Anthropic also claimed that those pirated books had not been used to train their models.
They've since bought vast numbers of second hand books and scanned those for training, which appears be legal.