OpenAI's Sam Altman has refuted claims by Elon Musk that the newly-announced Stargate Project has no money.

The new business was announced by President Donald Trump, with a promise of $100 billion in immediate investment and $500 billion over four years. SoftBank, OpenAI, Oracle, and Abu Dhabi's MGX are the equity investors in the business, which will build AI data centers for OpenAI.

At the announcement press briefing, representatives from the investors spoke about how the project was only possible because of Donald Trump.

"They don’t actually have the money," Elon Musk said on Twitter/X, the social media platform he owns. "SoftBank has well under $10 billion secured. I have that on good authority."

Musk, alongside his Tesla, SpaceX, and other business interests, has a White House job as head of the US DOGE Service, a renaming of the pre-existing US Digital Service. There, he has a White House office and email.

It is unusual for a prominent White House official to dispute the flagship announcement of the President who appointed them.

Alongside his role at DOGE, Musk also leads xAI, an OpenAI competitor. He is currently suing OpenAI over its move to become for-profit, and previously pitched Tesla acquiring them and making them for-profit.

OpenAI's CEO Sam Altman said that Musk's comments about funding were "wrong, as you surely know."

He added: "Want to come visit the first site already underway?

"This is great for the country. I realize what is great for the country isn't always what's optimal for your companies, but in your new role I hope you'll mostly put [America] first."