xAI’s Grok 4.20 Stuns in Live Trading as Privacy Firestorm Erupts – What the Latest xAI News Means (Dec 5–7, 2025)
xAI’s Grok 4.20 was the only major AI model to finish Alpha Arena’s real-money trading competition in profit, turning $10,000 into about $14,700. The company also faced investigations over privacy and doxxing, while a viral story claimed Grok “saved” a man’s life. xAI held a 24-hour hackathon to showcase new capabilities between December 5 and 7.