Anthropic paid $1.5 billion to authors whose books were used to train its Claude AI model, as part of the class-action settlement Bartz v. Anthropic approved on July 20, 2026 by Judge Araceli Martínez-Olguín. This amount, distributed across approximately 500,000 titles at roughly $3,000 per book, represents the largest copyright settlement in US history. The ruling draws a clear line: using pirated materials to train AI constitutes copyright infringement, while using lawfully acquired texts qualifies as fair use. This means AI companies can now purchase books and ingest them for training without paying ongoing royalties or negotiating licenses after the initial purchase. For authors, the settlement creates a two-tier system where piracy is punished but legal acquisition of their works by AI companies is effectively blessed, without recurring compensation.
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