Elon Musk Launches Grok 4: AI Outperforms PhDs and Gives $300/Month Subscription<p>Elon Musk's startup xAI has launched Grok 4, a brand new flagship synthetic intelligence mannequin that, in response to Musk, outperforms PhDs. Concurrently, xAI launched a brand new SuperGrok Heavy subscription for $300 monthly, making it the most costly on the AI market.</p>