Altman responds to Musk's claim in a federal racketeering lawsuit that OpenAI investors must agree not to invest in rivals: "That is false."

A drawn-out legal fight looms for Elon Musk and Sam Altman as they face an increasingly long courtroom battle over the future of OpenAI while also taking potshots at each other on social media.

The world's richest man went on a social media tirade against the Open AI chief executive for his former stance on Donald Trump.