Elon Musk has filed a lawsuit against OpenAI and its CEO, Sam Altman, alleging that they violated the company's founding principles by prioritizing commercial interests over the public good in the development of artificial intelligence. Musk claims that OpenAI's partnership with Microsoft has led to a departure from its original commitment to responsibly develop AI for public benefit. The lawsuit also points to regulatory scrutiny and other legal issues facing OpenAI and seeks to require the company to open its technology to others and to repay Musk's contributions. Musk's involvement and financial support for OpenAI are highlighted in the lawsuit, which could shed light on the company's transition from a nonprofit to a for-profit entity.