Elon Musk and OpenAI CEO Sam Altman are fighting on X about Stargate, the infrastructure project to build data centers for OpenAI in the U.S.

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.

Hours later, Elon Musk publicly raised questions about whether the joint venture would ever get off the ground.Late Tuesday night and early Wednesday morning, Musk wrote on X, his social-media platform,