Elon Musk, during a virtual appearance at the All-In Summit, expressed concerns about Microsoft's significant control over OpenAI, stating that Microsoft could potentially 'cut off' OpenAI at any moment. Musk also expressed discomfort with entrusting the future of superintelligence with companies like Microsoft and Alphabet's Google. He suggested the need for a third contender in the AI landscape, mentioning his new venture, xAI, and Tesla as potential alternatives.