Four wrongful death lawsuits were filed against OpenAI on Thursday, as well as cases from three people who say the company’s chatbot led to mental health breakdowns.

The cases, filed in California state courts, claim that ChatGPT, which is used by 800 million people, is a flawed product. One suit calls it “defective and inherently dangerous.” A complaint filed by the father of Amaurie Lacey says the 17-year-old from Georgia chatted with the bot about suicide for a month before his death in August. Joshua Enneking, 26, from Florida, asked ChatGPT “what it would take for its reviewers to report his suicide plan to police,” according to a complaint filed by his mother. Zane Shamblin, a 23-year-old from Texas, died by suicide in July after encouragement from ChatGPT, according to the complaint filed by his family.