Sony and UMG Sue Suno Again Over AI Music

Sony and Universal Music Group have renewed their legal fight against Suno, filing another lawsuit over the AI music startup's latest model. The labels claim Suno's v6 system still infringes their copyrights, even after earlier disputes. According to the complaint, v6 was trained on outputs created by previous Suno models, which were themselves trained on unlicensed music ripped from YouTube and other sources. That chain of training data is now at the center of the case. The lawsuit escalates one of the most important battles in generative AI. Music labels argue that AI companies cannot build commercial products on copyrighted recordings without permission, regardless of whether the material is fed directly into a model or filtered through user-generated outputs. Suno and other AI music startups have generally argued that their training practices are fair use and that their tools enable new forms of creativity rather than replacing human artists. The outcome could shape how copyright law applies to models that learn from copyrighted works, user prompts, and generations. If courts accept the labels' theory, AI developers may face stricter obligations to document and license training data, even when data comes from their own users. If Suno prevails, it could strengthen the argument that training on existing culture is transformative and permitted. For artists and rights holders, the case is about consent and compensation in an era when AI can imitate styles and produce convincing tracks in seconds. For Suno, it is an existential test of its business model. The renewed suit also signals that major labels are not waiting for legislation or voluntary agreements. They are using courts to define the rules of AI music, one model version at a time.