Linda Yaccarino stepped down as X's CEO a day after the platform's AI chatbot, Grok, went haywire and began praising Adolf Hitler's actions in responses to users.

Elon Musk appeared to give a mocking response to his artificial intelligence chatbot’s Hitler-praising comments on X. On Tuesday, the chatbot called Grok—created by Musk’s company xAI—started giving unhinged responses to users on the billionaire’s social media platform.

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.”