Sony and UMG Sue Suno Again Over AI Model Trained on Infringing Outputs

Sony Music and Universal Music Group have filed a new lawsuit against AI music startup Suno, targeting its latest v6 model. The labels allege that the new model was trained on outputs generated by earlier models, which were themselves built on unlicensed music sourced from YouTube and other platforms. Sony and UMG are among the few major labels that have not signed a licensing deal with Suno. The complaint, shared with The Verge, accuses Suno of 'model laundering' — the practice of using a new model to obscure copyright infringement carried over from a previous one. The labels argue that retraining on tainted outputs does not remove the original infringement but instead perpetuates it.