Musk ramps up lawsuit against OpenAI, adding Microsoft, antitrust claims

Billionaire entrepreneur Elon Musk expanded his lawsuit against ChatGPT maker OpenAI, adding federal antitrust and other claims and adding OpenAI’s largest financial backer Microsoft as a defendant.

Musk’s amended lawsuit, filed on Thursday night in federal court in Oakland, California, said Microsoft and OpenAI illegally sought to monopolize the market for generative artificial intelligence and sideline competitors.