Elon Musk is clashing with OpenAI CEO Sam Altman over the Stargate artificial intelligence infrastructure project touted by President Donald Trump, the latest in a feud between the two tech billionaires that started on OpenAI's board and is now testing Musk's influence with the new president.

Musk slammed a Trump-backed $500 billion AI joint venture building out OpenAI’s artificial general intelligence.

Trump announced a $500 billion joint venture between OpenAI, Softbank, MGX and Oracle to build new datacenters to power the next wave of AI.

On Tuesday, Japanese tech investor SoftBank Group joined U.S. peers OpenAI and Oracle to unfurl the massive spending initiative, dubbed the "Stargate" project. The plan is to initially commit $100 billion then increase spending to $500 billion over the next four years.

OpenAI CEO Sam Altman called Stargate, “the most important project for this era” and promised that all of the new investment his company was making would help cure diseases. Altman was actually prompted by Trump to talk about the medical advances that AI would supposedly figure out.

Elon Musk, the close Trump adviser who has his own AI company and was notably not at the press conference, mocked the effort relentlessly online. “They don’t actually have the money,” he posted on X.

Under the Trump administration, OpenAI and other members of the tech sector are making a push to establish AI dominance in the U.S. On Tuesday, the ChatGPT maker announced The Stargate Project, a $500 billion venture to invest in AI infrastructure.

OpenAI, Oracle, and SoftBank formed Stargate, a new venture investing up to $500 billion in AI infrastructure in Texas. President Donald Trump talked up the partnership on Jan. 21, calling it ”a resounding declaration of confidence in America’s potential.

President Donald Trump announced Stargate, a $500 billion investment in AI infrastructure. His attention then turned to TikTok ownership and tariffs.