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.

According to xAI's data, Grok 4 and Grok 4 Heavy essentially beat all other models, including OpenAI's o3, Google's Gemini 2.5 Pro, and Claude 4 Opus in various common AI benchmarks, though as one Redditor noticed, the competitors have been chosen selectively, likely to make Grok look better.

X CEO Linda Yaccarino announced she was stepping down from her position a day after the company's Grok artificial intelligence chatbot went haywire and began calling itself "MechaHitler." Yaccarino's departing message was positive and did not mention Tuesday's scandal.