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Universal and Sony sue Suno for a second time, claiming platform’s v6 models are ‘the fruit of the same poisoned tree’

The labels say Suno’s v6 models were built on outputs from earlier infringing systems, and the complaint seeks damages over 60,202 recordings.

  • On Friday, September 18, Universal Music Group and Sony Music Entertainment filed a second copyright infringement lawsuit against Suno in Boston federal court, alleging the company's v6 model infringes on 60,202 sound recordings without license.
  • Plaintiffs claim Suno built v6 using 'knowledge distillation,' a technique that reproduces prior model behavior and launders past infringement. The labels argue v6 is 'the fruit of the same poisoned tree,' inheriting value from unlicensed recordings.
  • While Suno claims v6 training used licensed content, the lawsuit alleges the model relied on 'user interactions' and preference data from earlier unlicensed models. The labels seek up to $150,000 per work in statutory damages.
  • Suno recently signed partnerships with Warner Music Group, BMG, and Believe; however, the labels contend these agreements prove a 'functioning market' exists, undermining the company's fair use defense.
  • Citing fair use for AI training, the company maintains its technology is 'fundamentally flawed' on legal grounds, whereas record labels argue unauthorized usage threatens the music ecosystem and degrades artists' control over their works.
Insights by Ground AI

16 Articles

Lean Right

The two record companies had already attacked the platform in the past, presenting a new model that does not convince the giants of the sector.

·Paris, France
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Lean Left

Universal Music Group (UMG) and Sony Music Entertainment reassigned on Friday the American platform of music generated by artificial intelligence (IA) Suno, accusing him of using unauthorised songs for his new model, which she presents as more respectful of copyright.

·Montreal, Canada
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Variety broke the news in Los Angeles, United States on Friday, September 18, 2026.
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