All AI wants for Christmas is a vast back catalogue of songs without paying for it, according to a multibillion-dollar lawsuit against the startup behind the Claude chatbot. Sony Music Publishing and Warner Chappell, music publishers who manage copyrights for songwriters and composers, are seeking damages for alleged misuse of 'tens of thousands' of copyrighted works by Anthropic. The compositions include Mariah Carey's 'All I Want for Christmas is You', 'Ain't No Mountain High Enough' (originally performed by Marvin Gaye and Tammi Terrell), and Survivor's 'Eye of the Tiger'. The plaintiffs claim they are victims of 'one of the largest and most blatant ongoing thefts of intellectual property in history'.

The lawsuit, filed in a California court, targets Anthropic and its CEO Dario Amodei, as well as co-founder Benjamin Mann. It alleges the defendants breached copyright law by 'torrenting, scraping and downloading' lyrics from copyrighted works to train its Claude AI models - as well as reproducing those lyrics in responses to user prompts. It claims that Mann and Anthropic downloaded at least 7 million copies of books from pirate websites, including lyrics and sheet music to songs such as Bon Jovi's 'Livin' on a Prayer' and Leonard Cohen's 'Hallelujah'. The figures come from a recent copyright case against Anthropic brought by US authors, which the company settled for $1.5bn.

The lawsuit, filed on 28 August, was first reported by trade publication Music Business Worldwide. Other songs allegedly infringed include Mark Ronson's 'Uptown Funk' and Katy Perry's 'California Gurls'. It also claims that Anthropic acquired copies of songs by scraping lyrics from legal sites like Musixmatch and LyricFind, and from datasets on archive sites like Common Crawl. In another section, the publishers allege that Anthropic stripped identifying information from songs while processing the texts, denying copyright owners 'valuable attribution' to their work. 'Defendants specifically elected to harvest unauthorized copies of Music Publishers' works so that they would not have to pay Music Publishers a licensing fee to use their works in AI training and development,' said the plaintiffs.

The music publishers are seeking damages that could run into billions of dollars, based on a claim of up to $150,000 per infringed work and $25,000 for each removal or alteration of identifying data. The suit implies at least 20,000 works are involved, referring to the unlawful copying of 'tens of thousands of Music Publishers' copyrighted musical compositions'. Ed Newton-Rex, a UK-based composer and campaigner for protecting artists' copyright, said he was 'not surprised' that rights holders were defending themselves against a company with a 'history of downloading and training their AI models on huge libraries'.

Alongside the authors' lawsuit, Anthropic has also faced claims from Universal Music Group and Concord Music Group. In a separate case this month, AI music generator Suno lost a copyright infringement case against German licensing agency GEMA, which alleged illegal use of songs including Boney M's 'Daddy Cool' to train its technology. Anthropic, which is preparing for a stockmarket listing that could value the company at $2tn, has been approached for comment. It told TechCrunch: 'We disagree with the publishers' claims and we intend to defend ourselves robustly in court.'