Sony, Warner sue Anthropic, alleging "blatant theft" of intellectual property; Axios, August 29, 2026

 Ben Berkowitz , Axios; Sony, Warner sue Anthropic, alleging "blatant theft" of intellectual property

"Some of the world's largest music publishers filed a blockbuster lawsuit against Anthropic late Friday night, alleging "one of the largest and most blatant ongoing thefts of intellectual property in history."

Why it matters: The suit is the opening salvo in what is now likely to be a yearslong fight over music, AI, and how intellectual property is protected in a new era of technology.

Driving the news: Units of Sony Music and Warner Music filed the suit in federal court in northern California late Friday night, naming Anthropic, CEO Dario Amodei and co-founder Benjamin Mann as defendants. 

The big picture: The Sony/Warner lawsuit is notable because it's broad.

It alleges Anthropic unlawfully trained its models off "tens of thousands" of music publishers' copyrighted compositions, whereas other lawsuits have focused on a narrower set of works.

BMG's lawsuit against Anthropic, for example, claims infringement against 493 compositions."

Warner Music Settles Copyright Suit With AI Song Generator Udio; Bloomberg Law, November 19, 2025

Aruni Soni

, Bloomberg Law; Warner Music Settles Copyright Suit With AI Song Generator Udio

"Warner Music Group reached a deal with AI music-generator Udio, putting to bed its copyright lawsuit over the use of songs to train the startup’s AI model."

‘Happy Birthday’ Copyright Case Reaches a Settlement; New York Times, 12/9/15

Ben Sisario, New York Times; ‘Happy Birthday’ Copyright Case Reaches a Settlement:

"After more than two years of litigation, “Happy Birthday to You” — often called the most popular song in the world, but one that has long been under copyright — is one step closer to joining the public domain.

In September, a federal judge ruled that Warner Music, the song’s publisher, did not have a valid copyright claim to “Happy Birthday,” which has been estimated to collect $2 million a year in royalties. But what that ruling meant for the future of the song — and Warner’s liability — was unclear, and a trial had been set to begin next week.

In a filing on Tuesday in United States District Court in Los Angeles, the parties in the case said they had agreed to a settlement to end the case. The terms of that deal are confidential. But if the settlement is approved by the court, the song is expected to formally enter the public domain, meaning that it will not be covered by copyright and can be performed freely."