[mmargenot]

Do foundation model companies need to license these books or simply purchase them going forward?

[sharkjacobs]

> On June 23, 2025, the Court rendered its Order on Fair Use, Dkt. 231, granting Anthropic’s motion for summary judgment in part and denying its motion in part. The Court reached different conclusions regarding different sources of training data. It found that reproducing purchased and scanned books to train AI constituted fair use. Id. at 13-14, 30–31. However, the Court denied summary judgment on the copyright infringement claims related to the works Anthropic obtained from Library Genesis and Pirate Library Mirror. Id. at 19, 31.

https://www.documentcloud.org/documents/26084996-proposed-an...

> reproducing purchased and scanned books to train AI constituted fair use

[greensoap]

Actually, the court really only said downloading a pirated book to store in your "library" was bad. The opinion is intentionally? ambiguous on whether the decision regarding copies used to train an LLM applies only to scanned books or also to pirated books. The facts found in the case are the training datasets were made from the "library" copies of books that included scans and pirated downloads. And the court said the training copies were fair use. The court also said the scanned library copies were fair use. The court found that the pirated library copies was not fair use. The court did not say for certain whether the pirated training copies were fair use.

[thaumasiotes]

The usual analysis was that when you download a book from Library Genesis, that is an instance of copyright infringement committed by Library Genesis. This ruling appears to reverse that analysis.

[bhickey]

Probably the latter.