Altman and Musk were OpenAI’s founding co-chairs in 2015, but their relationship has devolved into name-calling and lawsuits.

Elon Musk “very much” overstepped his bounds when he criticized a $500 billion artificial intelligence project touted by President Donald Trump, according to a White House official as aides are reportedly “furious” with the tech mogul while allies lament that he “abused the proximity to the president.”

Elon Musk claimed overnight Tuesday that tech giants OpenAI, Oracle and Softbank don’t have enough money to fulfill their high-profile pledge to invest $500 billion in U.S. artificial intelligence infrastructure.