Yaccarino announced her departure on X, saying that she is “immensely grateful” to Elon Musk for taking her on in 2023.

Musk's announcement comes hours after xAI debuted its latest flagship AI model, Grok 4. The 54-year-old discussed the recent innovation during a nearly hour-long livestream shared on xAI's X page, during which he did not mention the chatbot's integration into Tesla vehicles.

Elon Musk said changes his xAI company made to Grok to be less politically correct had resulted in the chatbot being “too eager to please” and susceptible to being “manipulated.” That apparently led it to begin spewing out antisemitic and pro-Hitler comments on Musk’s X social platform Tuesday.