"I genuinely respect your accomplishments and think you are the most inspiring entrepreneur of our time," Altman wrote in an X post to Musk.

Elon Musk asked a judge to block OpenAI's attempt to transition from nonprofit to for-profit. It's not the first time he's feuded with CEO Sam Altman.

Tesla Inc. CEO Elon Musk cast doubt Wednesday on the ambitious $500 billion Project Stargate, hours after its announcement, claiming lead investor SoftBank Group SFTBY -0.36% + Free Alerts SFTBF + Free Alerts has “well under $10B secured.”

Elon Musk raises concerns about the Trump-backed $500 billion Stargate AI Project, questioning SoftBank's ability to fund the initiative.

Mr. Trump had claimed the A.I. announcement as an early trophy, taking credit for the companies’ decision to spend up to $500 billion building data centers.

The Stargate project has big implications for U.S. AI leadership, but also for who's winning the new president's ear.

Elon Musk has expressed doubts about the financial feasibility of the $500 billion Stargate AI Project announced by President Donald Trump. The project, led by OpenAI and SoftBank, aims to build AI infrastructure across the US,

Musk's stance on the issue also contradicts Trump's announcement, who on Tuesday at a White House news conference along with Oracle Chief Technology Officer Larry Ellison, Softbank CEO Masayoshi Son and Open AI CEO Sam Altman,

Elon Musk is already casting doubt on OpenAI’s new, up to $500 billion investment deal with SoftBank (SFTBY) and Oracle (ORCL), despite backing from his allies — including President Donald Trump.

Tech titan Elon Musk cast doubt Wednesday on a $500 billion AI project announced by US President Donald Trump, saying the money promised for the investment..

The Stargate announcement prompted immediate skepticism over whether it would come to fruition, or represented new spending by the companies.