Over 230 Tech Firms Sign Open-Weight Letter, Huang's First Tweet Backs It

Over 230 tech companies and organizations signed an open letter titled 'Open Weights and U.S. AI Leadership,' urging open-weight AI as a strategic priority. Nvidia CEO Jensen Huang's first tweet endorsed it, citing security and sovereignty. Notably, Anthropic is the only major frontier lab not to sign, highlighting the open vs. closed debate.

Confirmed

• More than 230 companies and organizations, including Nvidia, Microsoft, Meta, OpenAI, Google, a16z, Palantir, Coinbase, Anaconda, and Fireworks AI, signed the letter.
• Jensen Huang posted his first tweet on X, signing and publicly supporting the letter, emphasizing that open weights are about security and sovereignty.
• Microsoft Vice Chair and President Brad Smith confirmed Microsoft's participation, thanking Nvidia, a16z, and Palantir.
• Coinbase CEO announced joining, stating that building open, permissionless systems is vital for AI's future.
• Fireworks AI President George Hu said the company signed because intelligence should not be controlled by a few frontier labs.
• Anaconda voiced support, noting that closed models incur ongoing API costs, while open source turns AI into infrastructure.

Unconfirmed

• Reports on the total number of signatories vary dynamically, from 25 to 70+ to 230+, with the latest official count pending.

Why it matters

• This marks the open vs. closed model debate evolving into a broader industry trend, reshaping infrastructure and other software domains.
• According to @ivanbezdomny and @maierak, open source prevents AI monopoly by a few closed-source giants and builds a decentralized ecosystem, akin to the 1980s open-source software movement, boosting the AI economy.

2026-07-29 ~ 2026-07-31 · 10 related posts

Full story(12 episodes)→

• Episode 1: NVIDIA Tops Hugging Face Open Source Contributions(2026-07-24, 6 posts)
• Episode 2: Jensen Huang's First Post Ignites AI Route Debate, Tech Giants Co-sign for Open Weights(2026-07-24, 59 posts)
• Episode 3: a16z Advocates Open Weight Models for US AI Competitiveness(2026-07-24, 2 posts)
• Episode 4: Tech Giants Unite Behind Jensen Huang's Open Weights Letter(2026-07-25, 14 posts)
• Episode 5: Anthropic Researcher Mocks NVIDIA's Open Source Stance, Sparking Industry Debate(2026-07-25, 12 posts)
• Episode 6: VCs and Tech Giants Debate Over Open-Weight AI(2026-07-25, 4 posts)
• Episode 7: AI Community Mocks Major Lab for Never Open-Sourcing Models(2026-07-25, 4 posts)
• Episode 8: Nvidia Tops Hugging Face Repo Chart, Sparking Open-Source Debate(2026-07-26, 5 posts)
• Episode 9: NVIDIA Forms Open Secure AI Alliance to Champion Open Weights(2026-07-26, 48 posts)
• Episode 10: 70+ Organizations Back the Open Weights Push(2026-07-27, 18 posts)
• Episode 11: Jensen Huang's Endorsement of Open Source AI Deepens Silicon Valley Divide(2026-07-28, 4 posts)
• Episode 12: Over 230 Tech Firms Sign Open-Weight Letter, Huang's First Tweet Backs It(2026-07-29, 10 posts)

• A sign-on list spanning OpenAI, Anthropic, Google, Microsoft and Nvidia keeps growing — ccerrato147 · 2026-07-29
• Fireworks AI president says open weights should belong to every company — lqiao · 2026-07-29
• Nvidia, Meta, and 25 Orgs Urge Washington to Protect Open-Weight AI — anacondainc · 2026-07-30
• NVIDIA and 70+ Companies Sign Open Letter Supporting Open-Weight AI Models — NVIDIAAI · 2026-07-30
• NVIDIA and 70 Giants' Open Letter: Open Weights Define US AI Leadership — maier_ak · 2026-07-30
• [source] Over 230 Companies Sign Open Letter Supporting Open Weights and American AI Leadership, Including Microsoft, Nvidia, a16z — ctnzr · 2026-07-30
• [source] NVIDIA's Open Weights Letter Hits 230 Signatories, Anthropic Remains Sole Holdout — ivan_bezdomny · 2026-07-31
• Microsoft-led open letter on open weights gains 230+ signatories including Coinbase, NVIDIA, a16z — kleffew94 · 2026-07-31
• [source] Jensen Huang's First X Post Backs Open Weights: A Security and Sovereignty Argument — Castieell99 · 2026-07-31

1 near-duplicate retellings: JiaZhihao