“Zlibrary my beloved”: Anthropic staff chats extolling piracy cited in Sony suit
Lawsuit: Anthropic’s torrenting totally screwed songwriters as AI songs top charts.

TL;DR
- Music publishers are suing Anthropic, claiming its $1.5 billion settlement for pirating books was insufficient.
- The lawsuit alleges Anthropic illegally torrented millions of copyrighted books and musical compositions.
- Publishers claim Anthropic's AI models compete with human songwriters and dilute royalty pools.
- Internal Anthropic messages, including "Zlibrary my beloved," are cited as evidence of the company's reliance on pirated content.
- Anthropic denies using pirated works for commercial models, but publishers argue their use in synthetic data and guardrails still constitutes infringement.
- Anthropic argues generative AI training is transformative fair use, a claim publishers contest regarding market harm.
- Publishers are seeking transparency into Anthropic's training data and methods.