UMG and Sony Sue Suno Again, Say v6 'Launders' 60,202 Recordings

Sony Music and Universal Music Group filed a 45-page complaint against Suno on Friday in U.S. District Court in Massachusetts, arguing that Suno's new 'v6' music model is still built on copyright-infringing training data.

The complaint's central metaphor is blunt. 'V6 is not a fresh start; it is the fruit of the same poisoned tree,' the labels write, according to Variety. The filing also argues that 'training a \'new\' model on the outputs of an infringing model does not eliminate the infringement; it launders it.'

The two labels identify 60,202 recordings they allege Suno infringed, and call that figure 'only a small portion' of total violations across Suno's model versions.

Suno launched v6 earlier in September with licensing deals from Warner Music, BMG, and Believe, partnerships we covered when they were announced. Sony and UMG did not sign, and their argument is that licensed inputs to v6 do not clean up a model whose foundation was trained partly on outputs from Suno's older, unlicensed systems.

A Suno spokesperson called the labels' claims 'fundamentally flawed on both the facts and the law,' saying the platform helps users 'learn the language of music and make something of their own.'

The labels are seeking a declaration of infringement, statutory damages, and attorneys' fees. Round Hill Music and the artist Jason Isbell have separate suits pending. It is the latest entry in a run of copyright cases our tracker has followed against generative-audio vendors this quarter.