Elon Musk’s artificial intelligence startup xAI is rolling out Grok 4 just months after releasing its previous iteration, underscoring the frenetic pace of AI development.

SpaceX has agreed to invest $2 billion in Elon Musk's AI startup xAI, marking one of its largest external investments and nearly half of xAI's recent $5 billion equity raise, the Wall Street Journal r...

“It’s extraordinary,” said Simon Willison, an independent AI researcher who’s been testing the tool. “You can ask it a sort of pointed question that is around controversial topics. And then you can w...