They target the case that Concord Music Group, Universal Music Publishing Group and ABKCO are pursuing over more than 20,000 songs. The suit, referred to in the filings as “Concord II,” is the second and larger of two separate copyright cases the same publishers have brought against Anthropic. Much of Anthropic‘s motion focuses on the publishers’ claim that Claude generates infringing lyrics in response to user prompts – what the filings call output-based infringement. Universal Music Group and Warner Music Group have both settled with Udio and signed licensing deals, and Warner Music Group has also settled with Suno – so far the only major label to do so. Sony Music remains in litigation against both Udio and Suno, while Universal Music Group is still fighting Suno.