“We are aware of recent posts made by Grok and are actively working to remove the inappropriate posts,” the company said in a statement.

Hours later, on Wednesday, X CEO Linda Yaccarino resigned from the company after just two years at the helm, though it wasn’t immediately clear whether her departure was related to the Grok issue.

Two days before the launch of Grok 4, the previous version of the chatbot made headlines for praising Adolf Hitler in response to an antisemitic question posted by a user on X (formerly Twitter).