On Friday, 25 US tech companies co-signed a three-page letter titled "Open Weights and American AI Leadership," promoted by Nvidia CEO Jensen Huang in his very first post on X. The ask is narrow but loaded: don't hit open-weight AI models — the kind anyone can download and run — with "premature restrictions."

Read the guest list and the real story jumps out. Signers include Nvidia, Microsoft, Meta, Dell, IBM, Palantir, ServiceNow, CrowdStrike, Hugging Face, Mistral, Andreessen Horowitz and Y Combinator. Conspicuously absent: OpenAI, Anthropic and Google — and, quietly, Amazon. As Tom's Hardware put it, none of the signatories sells access to a closed frontier model. That's the whole tell.

Why the split is really a business-model fight

The camp that signed sells picks-and-shovels or already gives its weights away. Nvidia wins when models multiply, because open weights get served off enterprise clusters, regional clouds and on-prem racks — buyers who have no in-house TPU (Google) or Trainium (Amazon) to fall back on, so they buy Nvidia GPUs. Huang has said roughly one in four AI tokens generated today already comes from an open model. Meta signed because its entire Llama strategy depends on open weights staying legal. The three who skipped it — OpenAI, Anthropic, Google — earn their margin from a proprietary model behind an API. Cheap, capable open models erode exactly that pricing power.

The timing isn't subtle either: the letter landed four days after the Trump administration was reported to be reviving a push to ban Chinese AI models (following Moonshot's Kimi K3 launch), with Treasury Secretary Scott Bessent floating IP-theft reviews and possible sanctions on the firms behind them.

What flips it: watch Washington's actual call on restricting downloadable models — a Bessent-led sanctions move would hand pricing power straight back to the closed labs. Nearer term, Microsoft and Meta report earnings the week of Jul 27–31; if either softens on open-model spend, the read-through hits Nvidia's demand story first.

As of 26 Jul 2026, 09:45 IST. Sources: Tom's Hardware, Open Weights and American AI Leadership (letter), CNBC. For discussion and education only — not investment advice. Verify before acting.