A 26-year-old former OpenAI researcher, Suchir Balaji, was found dead in his San Francisco apartment in recent weeks, CNBC has confirmed.

Balaji left OpenAI earlier this year and raised concerns publicly that the company had allegedly violated U.S. copyright law while developing its popular ChatGPT chatbot.

“The manner of death has been determined to be suicide,” David Serrano Sewell, executive director of San Francisco’s Office of the Chief Medical Examiner, told CNBC in an email on…