A group of authors, including Sarah Silverman and Ta-Nehisi Coates, have lost their lawsuit against Mark Zuckerberg’s Meta. The writers sued the tech company over their copyrighted works being used to train Meta’s artificial intelligence large language models (LLMs) without permission.

A federal judge ruled that Meta’s unauthorized use of copyrighted works from Sarah Silverman and other authors to train generative AI models is a “fair use,” but warned that the practice may in many circumstances be illegal.

Federal Judge Vince Chhabria has ruled in favor of Meta over the 13 book authors who sued the company for training its large language model on their published work without obtaining consent.