In a twist to the legal battle between Elon Musk and OpenAI, a group of former OpenAI employees are challenging the AI startup's move to a for-profit structure. They support Musk's claim that CEO Sam Altman is deviating from the company's original charitable mission.

In a friend of the court filing by Harvard law professor Lawrence Lessig, a dozen former employees accuse OpenAI of abandoning its nonprofit roots and betraying the mission that originally attracting them to the organization.

The two tech CEOs are clashing over the future of artificial intelligence, Musk branding his rival as "Scam Altman" on social media.