--- title: Sony music and Warner chappell just sued Anthropic, with... description: Sony Music Publishing and Warner Chappell have filed a multi-billion-dollar lawsuit against Anthropic, alleging it engaged in one of history's largest... canonical: https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Sony music and Warner chappell just sued Anthropic, with a multi-billion lawsuit, calling it ‘one of history’s biggest and most blatant ongoing intellectual property thefts.’ Sony Music Publishing and Warner Chappell want up to $150,000 per infringed work, disclosure of Anthropic's training data and collection methods, and destruction of infringing copies. --- Some of the things, the complaint alleges - They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated. - That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material. - They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning. - Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall. | daily.dev og:description: Sony Music Publishing and Warner Chappell have filed a multi-billion-dollar lawsuit against Anthropic, alleging it engaged in one of history's largest... og:url: https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc og:image: https://api.daily.dev/og/posts/DihUVxtMc.png og:image:alt: Sony music and Warner chappell just sued Anthropic, with a multi-billion lawsuit, calling it ‘one of history’s biggest and most blatant ongoing intellectual property thefts.’ Sony Music Publishing and Warner Chappell want up to $150,000 per infringed work, disclosure of Anthropic's training data and collection methods, and destruction of infringing copies. --- Some of the things, the complaint alleges - They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated. - That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material. - They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning. - Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall. og:image:width: 1200 og:image:height: 630 og:locale: en --- Some of the things, the complaint alleges - They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated. - That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material. - They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning. - Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall. | daily.dev image: https://api.daily.dev/og/posts/DihUVxtMc.png --- [Rohan Paul](https://daily.dev/sources/rohanpaul%5Fai) [Read on](https://api.daily.dev/r/DihUVxtMc) Today•From x.com  Rohan Paul @rohanpaul\_ai Sony music and Warner chappell just sued Anthropic, with a multi-billion lawsuit, calling it ‘one of history’s biggest and most blatant ongoing intellectual property thefts.’ Sony Music Publishing and Warner Chappell want up to $150,000 per infringed work, disclosure of Anthropic's training data and collection methods, and destruction of infringing copies. --- Some of the things, the complaint alleges - They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated. - That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material. - They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning. - Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall.  172 Impressions1 Upvote2 Comments Comment Bookmark Copy Share your thoughtsPost [](https://daily.dev/sources/rohanpaul%5Fai) [Rohan Paul](https://daily.dev/sources/rohanpaul%5Fai "https://daily.dev/sources/rohanpaul_ai") 7 Followers • 51 Upvotes #### Would you recommend this post? Copy link WhatsApp Facebook X New Squad Copy linkShare with your friends 1 2 ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Sony music and Warner chappell just sued Anthropic, with a multi-billion lawsuit, calling it ‘one of history’s biggest and most blatant ongoing intellectual property thefts.’\n\nSony Music Publishing and Warner Chappell want up to $150,000 per infringed work, disclosure of Anthropic's training data and collection methods, and destruction of infringing copies.\n\n---\n\nSome of the things, the complaint alleges\n\n- They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated.\n\n- That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material.\n\n- They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning.\n\n- Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall.","url":"https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc"},"datePublished":"2026-08-29T17:31:42.261Z","dateModified":"2026-08-29T21:59:02.802Z","description":"Sony Music Publishing and Warner Chappell have filed a multi-billion-dollar lawsuit against Anthropic, alleging it engaged in one of history's largest...","image":"https://pbs.twimg.com/media/HQ59XbVbwAAm2Qy.png","thumbnailUrl":"https://pbs.twimg.com/media/HQ59XbVbwAAm2Qy.png","isAccessibleForFree":true,"articleSection":"Rohan Paul","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Rohan Paul","logo":"https://media.daily.dev/image/upload/s--elRVZ626--/f_auto,q_auto/v1783603589/logos/rohanpaul_ai?_a=BAMAMicg0","url":"https://daily.dev/sources/rohanpaul_ai"},"commentCount":2,"discussionUrl":"https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":2}],"keywords":"machine-learning,genai,claude,anthropic"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rohan Paul","item":"https://daily.dev/sources/rohanpaul_ai"},{"@type":"ListItem","position":3,"name":"Sony music and Warner chappell just sued Anthropic, with a multi-billion lawsuit, calling it ‘one of history’s biggest and most blatant ongoing intellectual property thefts.’\n\nSony Music Publishing and Warner Chappell want up to $150,000 per infringed work, disclosure of Anthropic's training data and collection methods, and destruction of infringing copies.\n\n---\n\nSome of the things, the complaint alleges\n\n- They say that Anthropic co-founder Benjamin Mann discussed acquiring LibGen data with CEO Dario Amodei, who approved the torrenting; an earlier court found Mann knew the books were pirated.\n\n- That the pirated LibGen and PiLiMi material still reached commercial Claude models indirectly, through synthetic data and reinforcement feedback from other Anthropic models trained on that material.\n\n- They also accuse Anthropic of stripping copyright-identifying information from training material and rewarding accurate reproduction of copyrighted lyrics during finetuning.\n\n- Claude finetuning included copyrighted song lyrics, with reviewers selecting accurate lyric reproductions over inaccurate ones, effectively rewarding verbatim recall."}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/sony-music-and-warner-chappell-just-sued-anthropic-with-a-multi-billion-lawsuit-calling-it-one-of-dihuvxtmc","comment":[{"@type":"Comment","text":"Dario:","datePublished":"2026-08-29T17:53:16.845Z","url":"https://daily.dev/posts/DihUVxtMc#c-5aulX1njP","author":{"@type":"Person","name":"public class Name","url":"https://daily.dev/makotolord","image":"https://media.daily.dev/image/upload/s--YQz_8Z2N--/f_auto/v1752520309/avatars/avatar_BySqApZoninHIarUYmkD7?_a=BAMClqZW0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"Good stuff!\nNow, I’d expect the same lawsuits towards the Chinese government and the open models their companies are releasing!\nBut something tells me I won’t see such. Hmmm, I wonder why!","datePublished":"2026-08-29T18:50:39.984Z","dateModified":"2026-08-29T18:51:03.041Z","url":"https://daily.dev/posts/DihUVxtMc#c-WXTJur9Q0","author":{"@type":"Person","name":"Doncho Angelov","url":"https://daily.dev/doncho","image":"https://media.daily.dev/image/upload/s--j1MSm0hy--/f_auto/v1716369534/avatars/avatar_EB0j0Umzh5v3zGWUSL5ma"}}]} ```