Elon Musk on Wednesday unveiled Grok 4, a new version of his X platform's AI chatbot. The update comes a day after the bot posted antisemitic content on the social media network. Musk introduced the new model in a livestream on X late Wednesday, calling Grok 4 "the smartest AI in the world."

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.

In a livestream with xAI colleagues, the billionaire entrepreneur described current AI systems as “primitive” and not for “serious” commercial use.

In a late-night announcement, X owner Elon Musk unveiled the new Grok 4 chatbot. Here's everything you need to know about it.

Grok, the artificial-intelligence chatbot produced by Elon Musk -owned xAI, this week began posting antisemitic messages in response to user queries, drawing condemnation from Jewish advocacy groups and raising concern about the AI tool. The antisemitic posts -- some of which have been deleted -- are being addressed, Musk said on Wednesday.

Happy Thursday! I’m Andrea Jiménez, the tech bureau’s news aide, announcing some changes to the Tech Brief. The Thursday edition will highlight a selected Post story and continue the comprehensive tech policy news roundup that we have always run in every brief. The Tech Brief’s Tuesday edition will stay unchanged and be anchored by Will Oremus.

We are aware of recent posts made by Grok and are actively working to remove the inappropriate posts,” xAI said in a statement, adding that it “has taken action to ban hate speech before Grok posts on X.