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.

The billionaire rolled out the latest update on Grok after the previous model produced antisemitic rhetoric and graphic fantasies of sexual assault

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.