Universal Music Group (UMG) and Sony Music Entertainment filed a second joint copyright infringement lawsuit against generative AI platform Suno in a Massachusetts federal court. The complaint explicitly targets 60,202 specific sound recordings that forensic analysis uncovered within Suno’s systems, representing a massive volume of catalog material that was left out of the labels' ongoing 2024 lawsuit after a judge declined to let them expand the original case to avoid disrupting the trial schedule. Demanding maximum statutory damages of up to $150,000 per infringed work—a figure totaling over $9 billion—the record giants allege that Suno built its multi-billion-dollar technology on the backs of uncompensated human artists and unauthorized commercial audio.

The lawsuit takes direct aim at Suno’s recently launched Version 6 model, rejecting the AI firm’s claims that its latest release represents a clean slate trained alongside newly announced license partners. UMG and Sony argue that Version 6 was trained using outputs, user interactions, and knowledge distillation techniques from previous model iterations that relied on unlicensed recordings. Calling the new model "the fruit of the same poisoned tree," the labels maintain that transferring capabilities from older, infringing models simply launders the copyright violation rather than fixing it. Suno has maintained that training AI models on existing recordings constitutes fair use under copyright law.