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.

The takeaway, at least from a technical standpoint, is that Grok 4 is now firmly in frontier-model territory. That’s a meaningful shift for xAI, which just months ago was primarily known for its integration with X, the rechristened Twitter owned by Musk. xAI is clearly trying to be taken seriously as a legitimate AI research and enterprise company.

Elon Musk’s xAI has launched Grok 4, its latest AI model, with advanced reasoning, code tools, meme fluency and real-time web access. Early tests show Grok 4 outperforms OpenAI’s o3 and Google’s Gemini 2.

Elon Musk’s artificial intelligence company, xAI, has launched its newest chatbot model, Grok 4, along with a premium subscription plan

Musk said that Grok, his AI chatbot that praised Adolf Hitler and posted a barrage of antisemitic comments recently, will be in Tesla vehicles “next week.”