Sony and Warner Chappell sue Anthropic over tens of thousands of compositions, seeking multi-billion-dollar damages

Sony Music Publishing and Warner Chappell Music filed suit against Anthropic on August 28, 2026, in the US District Court for the Northern District of California. The complaint identifies "tens of thousands" of compositions used to train AI models. Statutory damages sought reach up to $150,000 per work, placing Anthropic's exposure in the multi-billion-dollar range. Co-founders Dario Amodei and Benjamin Mann are named as individual defendants.