Meta on Wednesday won a motion for partial summary judgment in its favor in Kadrey v. Meta, a case brought on by 13 authors alleging the company infringed on their copyright protections by illegally using their books to train its Llama AI models.

A federal judge on Wednesday sided with Facebook parent Meta Platforms in dismissing a copyright infringement lawsuit from a group of authors who accused the company of stealing their works to train its artificial intelligence technology.

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.