AI Daily Briefing — June 3, 2026: Microsoft Builds Its Own Frontier, Trump Revives Safety Reviews, Nvidia's Open-Weight Play
Microsoft launches seven in-house AI models to cut its OpenAI dependence, Trump signs an executive order reviving the frontier model safety review he killed 17 months ago, and Nvidia's Nemotron 3 Ultra leads US open weights—but trails China's Kimi K2.6.