SITUATION EXPLAINED: Jensen Huang published an open letter on open-weight AI, signed by 25 companies, but not Anthropic or OpenAI. • "Open Weights and American AI Leadership," Jensen Huang's actual first-ever post on X, signed by Meta, Microsoft, Palantir, Dell, IBM, Hugging Face, Mistral, Mozilla, Perplexity, Replit, Black Forest Labs, a16z, Y Combinator, and 12 others, 25 signatories total • @JensenHuang: "Open models strengthen safety and cybersecurity, accelerate innovation and diffusion,…