Elon Musk, a co-founder who left OpenAI in 2018, sued OpenAI, Sam Altman, and Greg Brockman in San Francisco Superior Court. He alleged that the company had abandoned its founding agreement to develop AI for the benefit of humanity, prioritizing profit through its relationship with Microsoft. On March 5, OpenAI pushed back by publishing early emails suggesting Musk himself had acknowledged the need for a for-profit structure and large-scale funding.