On this episode of AI RADAR, we break down the major shifts shaking the artificial intelligence landscape:Nvidia Pauses Investment: The proposed $100 billion deal with OpenAI has stalled due to "trust issues" and strategic concerns, leading OpenAI to seek backing from Amazon and SoftBank.Goodbye GPT-4o: OpenAI is officially retiring older models on Feb 13. Users are being forced to migrate to the new GPT-5.2 architecture to fix "sycophantic" outputs.Nvidia Under Investigation: The U.S. Congress is probing Nvidia over allegations it helped Chinese firm DeepSeek optimize chips for military applications.Sources:Based on industry news (Jan 31–Feb 1, 2026).