Meta, Microsoft, a16z, and others sign a letter defending open-weight AI models; Jensen Huang, in his first X post, says open models strengthen cybersecurity

Many of the largest U.S. tech companies signed a joint letter on Friday defending open-source AI software as the Trump administration …

The Information 2026-07-24 Leo Schwartz

Context & Ripple Effects

The joint intervention turns a long-running debate over AI access into a coordinated policy position from model developers, infrastructure suppliers and investors. Related coverage says the signatories asked lawmakers to avoid restrictions they argue would curb competition and push innovation overseas.

The cybersecurity rationale also extends an earlier industry pattern: companies including Google, OpenAI, Microsoft and Nvidia previously formed a coalition to share secure-AI practices and open-source methods. The new letter puts openness and security in the same policy argument rather than treating them as opposing goals.

First-order effects

Meta, Nvidia, Microsoft and a16z now have a shared public position against early limits on open-source or open-weight AI, concentrating their influence in the administration-facing policy debate.
Huang's cybersecurity argument gives the coalition a security-based case for broader model access, alongside its competition and innovation case.

Second-order effects

AI-policy advocates and critics will face a more explicit industry split over whether model openness reduces security risk through scrutiny or increases it through wider access.
Companies building or distributing open models gain a coordinated rationale for resisting rules that distinguish sharply between open and closed model access.

Third-order effects

If this alignment persists, AI governance may increasingly be negotiated around access architecture—who can inspect, modify and distribute models—rather than only around model capability or developer conduct.
The security framing could make open models a strategic-policy issue, with durable disagreement over whether openness is infrastructure resilience or an exposure that requires tailored controls.

The trend: AI firms are recasting open model access as a competitiveness and cybersecurity issue as governments move from voluntary AI commitments toward rules governing distribution and control.

Discussion

@jensenhuang Jensen Huang on x
For my first post, I'm sharing a letter @NVIDIA signed on why open models matter. AI will transform every industry, power every company, and be built by every country. Open models strengthen safety and cybersecurity, accelerate innovation and diffusion, and enable sovereignty. Th…
@natolambert Nathan Lambert on x
Co-sign with Interconnects AI Wonderful thing to wake up to. The key part on distillation …
@yuchenj_uw Yuchen Jin on x
Ladies and gentlemen: welcome Jensen Huang to X. Yes, open models matter!
@eladgil Elad Gil on x
Goat
@daveshapi David Shapiro on x
Glad to see the big dawgs coming out swinging in favor of open weights.
@mayhem4markets @mayhem4markets on x
Jensen Huang has never posted on X. Three decades running the most important company in AI, zero personal posts. …
@kimmonismus @kimmonismus on x
This is literally Jensen's first post on X, and it couldn't be more significant Together with Meta …
@gavinsbaker Gavin Baker on x
Awesome to have Jensen on X!
@edludlow Ed Ludlow on x
A significant interjection in the context of this past week(s). The OpenAI/Hugging Face situation, Kimi K3 both seem to have illuminated a deficiency in US opensource/weight?
@zephyr_z9 @zephyr_z9 on x
Jensen on twitter
@satyanadella Satya Nadella on x
Open-weight models are essential to a healthy AI ecosystem. Together with others across our industry, we are outlining a path for open-weight models to strengthen American competitiveness and expand economic opportunity, while protecting national security. https://www.microsoft.c…
@dareasmunhoz Diego Areas Munhoz on x
This is Jensens first tweet Hes sharing an open letter Nvidia, Meta, Microsoft, IBM and several other big names sighted this morning. They're making the case for the value of open source models as Washington is grappling with what to do with China's open models
@firstadopter Tae Kim on x
I'm told this is the real Jensen Huang. Give him a follow, folks!
@rickyho_1989 Ricky Ho on x
The debate over open-weight AI is becoming one of the most consequential policy discussions …
@firstadopter Tae Kim on x
Wow. Nvidia is seriously concerned Washington D.C. is going to overregulate and restrict open source/open weight models. …
@bradsmi Brad Smith on x
Open weight models play a critical role in building a broad AI ecosystem. That's why we are joining so many other industry leaders to support them.
@signulll @signulll on x
who is missing that should've signed? [image]
@vladsavov Vlad Savov on x
Start the countdown for the Jensen podcast
@teortaxestex @teortaxestex on x
«Open weights also strengthen competition and competition is what keeps the gains of AI broadly shared rather than concentrated in a few hands... That competition spurs innovation, drives down costs, and distributes the benefits of AI broadly across our economy.»
@ctnzr Bryan Catanzaro on x
The biggest question facing US AI leadership is whether we will treat AI models as infrastructure. …
@elonmusk Elon Musk on x
This has my full support. Jensen is right.
@zixuanli_ Zixuan Li on x
Meaningful AI progress will take deeper collaboration and understanding across diverse ecosystems. Let's build together.
@mikeisaac Rat King on x
severity level indicator: nvidia ceo creates a twitter account to do first ever post stumping for OSS
@nathancgy4 Nathan Chen on x
not all models should be open. closed models matter too. here the simple argument is “the world needs both frontier closed models and frontier open models.” and that's the right way of thinking it!
@bgurley Bill Gurley on x
Open models are the competitive edge. If the U.S. doesn't lead in open, it won't lead at all.
@ccatalini Christian Catalini on x
You know something is important when @JensenHuang pauses torturing talent into greatness to join and share on @X:
@bhorowitz @bhorowitz on x
America's software leadership was built on openness. We have the same opportunity in AI. If we want a competitive, secure AI ecosystem whose benefits extend far beyond a handful of companies, we need to preserve access to open-weight models. [image]
@emollick Ethan Mollick on x
The open weights models discussion would be much less fraught if all the frontier closed models weren't developed in the US and all the frontier open models weren't developed in China. It means that discussions over openness and AI are inevitability about a lot of other things.
@mikeisaac Rat King on x
other thing i would say: Meta signing this given their roadmap over the past year re: open source was a surprise to me [image]
@levie Aaron Levie on x
Very happy to have Box support this letter. We're big believers in the power of open source overall and open weights AI. …
@ccatalini Christian Catalini on x
“openness may be one of the most important paths to AI safety and security” — @a16z, @bfl_ai, @Box, @CrowdStrike, @Dell, @huggingface, @IBM, @linuxfoundation, @Meta, @Microsoft, @MistralAI, @mozilla, @nvidia, @PalantirTech, @perplexity_ai, @Replit, @ycombinator + more [image]
@deanwball Dean W. Ball on x
My view for years has been that the best version of the future is one where both open-weight and closed-weight models thrive. Both have unique sets of benefits and drawbacks. I hope that the U.S. can lead in both.
@andyvan Andy Vandervell on x
mic drop
@obrien Chris O'Brien on x
Breaking: Dr. Frankenstein wants to ensure he still has proper help in case his monster gets loose again.
@zerohedge @zerohedge on x
Narrator: “he was not, in fact, glad to see this”
@deanwball Dean W. Ball on x
By the way, it really is true that I have been supportive of open-weight models for years. Those who were in the weeds of the SB 1047 debate will recall that many of my criticisms of that bill related to its potential impact on open-weight models. I communicated poorly last week …
@mikebradleyai Mike Bradley on x
Glad to see you say this. This time last year you released two OS consumer grade models …
@altcap Brad Gerstner on x
Fully endorse. America is winning. Anthropic, OpenAI, Google, SpaceX are doing more than fine competing against open source! Self regulation, free markets, level playing fields & max competition for the win. Let our AI horses run, compete & win around the world! 🇺🇸🚀
@gladstein Alex Gladstein on x
Encouraging Would be great if OpenAI supported open-source 🙏
@zephyr_z9 @zephyr_z9 on x
HUH???? Where is the endorsement? [image]
@ns123abc Nik on x
OpenAI literally refused to sign the letter [image]
@suhail @suhail on x
Thank you @sama - This is the way.
@eliebakouch Elie on x
gpt-oss-2 pls 🥺
@ns123abc Nik on x
>"i want" oh really? then why does your actions reflect lobbying efforts against open weights ever since deepseek dropped r1 lmaoooo
@sama Sam Altman on x
i want the US to win in AI both in open source and proprietary models, and i am glad to see this
@aftfuture @aftfuture on x
Open weights are not a sideshow in the AI race. They are part of how America wins it. …
@bindureddy Bindu Reddy on x
Everyone is one big happy family now ♥️ Jensen Huang, Zuck, Satya Nadella, and Sam Altman all agree! They are all for open-source AI On the other side is Anthropic - they want to ban it 😭
@finkd Mark Zuckerberg on x
Open source is a positive and important force for both empowering people and preventing centralization. Proud to support this.
@miramurati Mira Murati on x
The knowledge that makes AI useful is diffused. It lives with scientists, engineers, clinicians, firms. For AI to benefit from distributed knowledge, it must itself be distributed. Agree with Jensen that this is a future worth building.
@aravsrinivas Aravind Srinivas on x
today is the most positive i have felt about the future of american ai. the coming together of so many companies in a united manner to fight against regulatory capture is incredible to watch. 🇺🇸
@wittywebhandle Blaise Ulysse Bernard Collins on bluesky
And the ‘Frontier’ AI Civil War begins in earnest — The companies that will not immediately die when Proprietary Models are no longer valuable: — Nvidia, Meta, Microsoft — And those that will: — Google, Amazon, OpenAI, Anthropic — Despite this schism; Both lanes are still…
@mikeisaac Rat King on x
one interesting thing here is jensen and satya tweet nine minutes apart at like six am. elon sees and QT's at 8am. mark goes QT at noon. really lays out who was possibly dialing who and, importantly, who wasnt [image]
@minimax_ai @minimax_ai on x
Welcome to X🥳 Thank you for supporting Opensource AI, Jensen!🫶
@ibab Igor Babuschkin on x
We need to build a future where the benefits of AI are broadly distributed among all of humanity and open models are the best tool we have to get there. I'm immensely grateful that Jensen is speaking out in support of open models.
@levie Aaron Levie on x
Not sure if anything in tech has ever gotten as much broad-based support and alignment as this post and message. …
@elonmusk Elon Musk on x
Overwhelming support for open source
r/politics r on reddit
Nvidia, Microsoft, Meta warn against ‘premature restrictions’ of open-weight models
@sriramk Sriram Krishnan on x
open weight models are how the U.S. wins on AI.
@mkratsios47 Director Michael Kratsios on x
White House OSTP Director Michael Kratsios says “we have information that Moonshot AI distilled Anthropic's Fable for the development of its K3 model”

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