OpenAI COO Departs, NVIDIA Nemotron 4, Gemini Hits 1B Users — AI News Briefing
OpenAI COO Brad Lightcap steps down as a leadership shake-up continues, NVIDIA pushes toward a 1-trillion-parameter Nemotron 4 open model and mobilizes $500B+ with Wall Street for AI infrastructure, and Google's Gemini app crosses 1 billion users. Also: Anthropic's no-opt-out Claude watermarking, a $9B Riot-Anthropic deal, and ChatGPT arrives on Linux.