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.”

Elon Musk has launched xAI’s Grok 4—calling it the “world’s smartest AI” and claiming it can ace Ph.D.-level exams and outpace rivals such as Google’s Gemini and OpenAI’s o3 on tough benchmarks

Elon Musk's Grok 4 claims PhD-level intelligence and the ability to solve engineering problems no book or website can answer.

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

On Wednesday night, Elon Musk unveiled xAI's latest flagship models Grok 4 and Grok 4 Heavy via livestream, just one day after the company's Grok chatbot began generating outputs that featured blatantly antisemitic tropes in responses to users on X.

But after the chatbot developed by Elon Musk’s start-up xAI ranted for hours about a second Holocaust and spread conspiracy theories about Jewish people, the company responded by deleting some of the troubling posts and sharing a statement suggesting the chatbot just needed some algorithmic tweaks.

Musk did not apologize nor did he accept responsibility for Grok's antisemitic, sexually offensive, and conspiratorial remarks.