OpenAI was hit with another copyright infringement suit by book authors, including comedian Sarah Silverman, last week alleging their copyrighted materials were used to train the artificial intelligence software program ChatGPT without their permission.

An identical suit was filed July 7 against Meta Platforms and its AI product called LLaMA, which was released in February. Similar allegations include that software engineers allegedly copied "massive amounts of text" from various sources, including the plaintiffs' books, to help the text output produce natural language.