Meta is facing a copyright lawsuit for using pirated materials to train its Llama AI models, as revealed in court documents related to the Kadrey v. Meta case. The company allegedly accessed the LibGen dataset, known for unauthorized file sharing of books and journals, with the approval of CEO Mark Zuckerberg. Despite internal warnings, Meta reportedly removed copyright information before incorporating these materials into its AI training. The lawsuit, brought by authors including Sarah Silverman and Ta-Nehisi Coates, claims that Meta's actions constitute copyright infringement. The case reflects ongoing concerns about AI training practices in tech companies.