In August 2024, a group of authors sued artificial intelligence (AI) technology firm Anthropic over its use of their works to train the company's AI systems (Guardian, Court Listener - Bartz v. Anthropic PBC Complaint). In June 2025, the trial court judge ruled that Anthropic's use of legally purchased copies of author's works was permissible as fair use, but said they would continue on to trial over Anthropic's use of pirated copies of works used to train its models (NPR, Bartz v. Anthropic PBC - Order on Fair Use). As of the launch of this question, the trial was scheduled to start on 1 December 2025 (Yahoo [Fortune]). A party reserving the right to appeal any rulings not related to pirated materials is immaterial. Whether the settlement is ultimately approved by the court is immaterial. The case name is Bartz v. Anthropic PBC,3:24-cv-05417, (N.D. Cal.) (Court Listener).

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The question closed "Yes" with a closing date of 26 August 2025.

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