Court Definitively Rejects Fair Use Defense In AI Training Case

In one of the most closely-watched copyright cases this year, a Delaware court rejected defendant, ROSS Intelligence's ("ROSS"), fair use and other defenses by vacating its previous stance and granting summary judgement in favor of plaintiff, Thomson Reuters ("Reuters"). The case stems from allegations that ROSS used copyrighted material from Reuters' legal research platform, Westlaw, to train its artificial intelligence ("AI")-driven legal research engine. While the decision will certainly be informative to the dozens of pending lawsuits against AI developers, it is important to note the scope of the opinion is limited to the specific facts of this case. Specifically, generative AI was not involved, and the court's analysis of the fair use factors was heavily focused on the fact that the parties are direct competitors.