Yaccarino’s departure comes as X integrates more closely with Musk’s AI startup, xAI and its Grok chatbot, which has come ...

AI launches Grok 4 with upgraded voice and reasoning, following Grok 3 backlash and leadership changes at X amid rising AI competition.

The world’s wealthiest person says Grok 4 is ‘smarter than almost all graduate students, in all disciplines, simultaneously’.