In the latest development in the high-stakes legal battle, a U.S. judge on Tuesday rejected billionaire Elon Musk’s plea for a preliminary injunction to halt OpenAI’s shift to a for-profit business model but consented to a fast-track trial in the fall of this year.

Musk does not have "the high burden required for a preliminary injunction" to block the conversion of OpenAI, said U.S. District Judge Yvonne Gonzalez Rogers in Oakland, California.

A California federal judge on Tuesday rejected Tesla founder and billionaire Elon Musk's bid to block OpenAI's partnership with Microsoft, but said she could expedite a trial to address the "core claims" of Musk's ongoing litigation against OpenAI.