Musk’s request to block OpenAI’s conversion is the latest move in a grudge match between the world's richest person and OpenAI CEO Sam Altman.

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.

Elon Musk is stepping up his efforts to block OpenAI from restructuring as a for-profit company after it received billions of dollars from investors, including early funding from him.

A federal judge signaled Tuesday that some parts of Elon Musk’s lawsuit attempting to block Sam Altman-led OpenAI from becoming a for-profit entity could go to trial – and said Musk would have to personally take the stand and testify.

Elon Musk's legal team challenges OpenAI's transition from a nonprofit to for-profit entity in federal court, citing a breach of founding principles.

A preliminary injunction stopping OpenAI’s conversion to a for-profit company is unlikely in a case of “billionaires versus billionaires,” said the judge.

Elon Musk and OpenAI CEO Sam Altman are fighting on X about Stargate, the infrastructure project to build data centers for OpenAI in the U.S.

A federal judge in California has ruled that parts of Elon Musk’s lawsuit against OpenAI over its for-profit transition may proceed to trial, requiring Musk to testify.