Several of the world's largest music publishers filed major lawsuits on Friday evening, calling the case “one of the largest and worst ongoing intellectual property thefts in history.” This lawsuit has begun, and a battle over intellectual property protection in the age of music, artificial intelligence, and new technologies may continue for several years. “Defendant Anthropic and its founders, Dario Amodei and Benjamin Mann, developed and operated Anthropic's Claude series artificial intelligence models through large-scale illegal torrenting, web crawling, and downloading copyrighted works, and used this to seize huge profits.” The plaintiffs also accused Anthropic of pirating thousands of copyrighted music works, demanding hundreds of thousands of dollars in compensation for each infringed work. This isn't the first time Anthropic has been accused of stealing content training models. In September 2025, the company reached the most expensive copyright settlement in US history, paying authors and publishers $1.5 billion.

Several of the world's largest music publishers filed major lawsuits on Friday evening, calling the case “one of the largest and worst ongoing intellectual property thefts in history.” This lawsuit has begun, and a battle over intellectual property protection in the age of music, artificial intelligence, and new technologies may continue for several years. “Defendant Anthropic and its founders, Dario Amodei and Benjamin Mann, developed and operated Anthropic's Claude series artificial intelligence models through large-scale illegal torrenting, web crawling, and downloading copyrighted works, and used this to seize huge profits.” The plaintiffs also accused Anthropic of pirating thousands of copyrighted music works, demanding hundreds of thousands of dollars in compensation for each infringed work. This isn't the first time Anthropic has been accused of stealing content training models. In September 2025, the company reached the most expensive copyright settlement in US history, paying authors and publishers $1.5 billion.