A group of investors led by Elon Musk says it is offering $97.4 billion to buy the nonprofit behind OpenAI, escalating a dispute with the artificial intelligence company that Musk helped found.

Elon Musk’s lawyers faced off with OpenAI in court Tuesday as a federal judge weighed the billionaire’s request for a court order that would block the ChatGPT maker from converting itself to a for-profit company.