This is the smartest AI in the world,” Musk said. He did not mention the chatbot’s viral posts praising Hitler and calling itself “MechaHitler.”

Grok 4 is xAI’s most advanced model yet, but early praise is clashing with old scandals and fresh tests of its limits.

Linda Yaccarino is stepping down as CEO of X after two years leading Elon Musk’s social media company. Yaccarino’s departure comes one day after the company’s Grok chatbot began pushing antisemitic tropes in responses to users. It’s not clear that the events were connected.

The NWS lost almost 600 workers in February amid cuts spearheaded by Musk’s Department of Government Efficiency (DOGE)

Elon Musk’s Grok chatbot has claimed that Jewish people run Hollywood, days after the billionaire launched a “significantly improved” version of the AI system.