Elon Musk’s live demo of Grok 4, the latest big-ticket model from his AI startup, began with high-intensity music, claims of a “ludicrous rate of progress,” and a lot of chatter on X about Grok’s scandal-filled week.

AI owner Elon Musk made some big claims about Grok’s capability, saying it was “better than PhD level in every subject.”

In the nearly three years since Musk acquired Twitter, the social-media platform has endured mass firings; an advertiser exodus; and, of late, antisemitic posts by its AI chatbot, Grok.