“Sony and Universal Music Group have filed a new lawsuit against AI music startup Suno, arguing its v6 model inherits copyright violations because it was trained on outputs from earlier models built on unlicensed music scraped from YouTube. The labels contend this creates a chain of infringement that the model update does nothing to resolve. Both Sony and UMG are notable holdouts who have refused to license their catalogues to Suno, unlike some other major music industry players.”
Key Takeaways
- Sony and UMG filed a second lawsuit against Suno, targeting its newly released v6 AI music model.
- Labels argue v6 is tainted because it trained on outputs from prior models, which used unlicensed music ripped from YouTube.
- Sony and UMG have not signed any licensing deal with Suno, unlike some other music industry stakeholders.
Major labels claim Suno's newest model still infringes copyrights through a chain of tainted training data.
trending_upWhy It Matters
This lawsuit signals that simply releasing a new model version is not enough to escape copyright liability if the underlying training lineage is legally compromised — a principle that could ripple across the entire generative AI industry. If courts accept the 'chain of taint' argument, AI companies may be forced to demonstrate clean data provenance across every generation of training, not just the most recent one. For AI music startups in particular, this raises the cost and complexity of compliance significantly. Developers, investors, and legal teams across the AI sector will be watching closely, as the outcome could set precedent for how copyright law applies to iterative model training.
FAQ
Why are Sony and UMG suing Suno a second time instead of continuing the first case?
The new suit specifically targets Suno's v6 model, which the labels treat as a distinct product that continues the alleged infringement. Filing a fresh case allows them to directly challenge whether the updated model remedied the original copyright violations.
What is the 'chain of taint' argument the labels are making?
Sony and UMG argue that because v6 was trained on outputs generated by earlier Suno models, and those models were trained on unlicensed music, the infringement carries forward into the new version. This means cleaning up the final model's direct training data may not be sufficient if earlier generations were legally compromised.
Have any major music labels actually licensed their music to Suno?
The article notes that Sony and UMG are notable holdouts who have not signed licensing agreements with Suno, implying some other industry players have reached deals. The identity of those licensors and the terms of any agreements have not been publicly disclosed.



