A group of music publishers, including Concord and Universal Music Group, sued Anthropic, accusing it of illegally downloading more than 20,000 copyrighted songs, with potential losses exceeding $3 billion. The lawsuit, filed by the same team of lawyers in a previous copyright infringement case, claims that Anthropic's business model is built on piracy and names CEO Dario Amodei and co-founder Benjamin Mann as defendants. This follows a court denied their request to amend an earlier lawsuit involving about 500 works in October last year.