Meta, Microsoft, OpenAI, 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 2026-07-25 Leo Schwartz

Context & Ripple Effects

The joint intervention extends a pattern in which major AI companies pair policy engagement with voluntary governance commitments, including their earlier White House AI governance pledges and a later agreement to allow national-security testing before release of certain AI models.

What is newly salient is the coalition’s effort to make model availability—not just safety procedures—a policy issue. Its companion argument against premature restrictions on open-weight models frames openness as a competition and security question.

First-order effects

The signatories present a unified position to the Trump administration: open-weight models should remain available rather than face early, blanket constraints.
Jensen Huang’s cybersecurity argument gives the coalition a security-based rationale for openness, alongside the letter’s competition-focused case.

Second-order effects

The debate shifts from whether AI needs safeguards to which access controls are justified; advocates of tighter rules will need to address the coalition’s claims about competition, overseas innovation, and defensive security use.
Companies that distribute or build on open-weight models gain a common policy narrative, while firms favoring more closed deployment models face a more explicit access-policy divide.

Third-order effects

If this alignment persists, AI governance is likely to increasingly treat model access as strategic infrastructure: policy may distinguish among model weights, deployment channels, and security testing rather than regulate “AI” as one category.
The industry’s recurring use of voluntary commitments alongside lobbying suggests a continuing push for company-led safety mechanisms before binding limits on model release are imposed.

The trend: Open-weight AI is becoming a central fault line in AI policy, where competitive openness and cybersecurity claims are increasingly weighed against demands for release controls.

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…
@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…
@elonmusk Elon Musk on x
This has my full support. Jensen is right.
@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
@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]
@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.
@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! 🇺🇸🚀
@mikeisaac Rat King on x
this does put anthropic in a tricky spot b/c i HIGHLY doubt they sign that letter (though an open letter is not legally binding puffery) and can shift the “we hate open source” ire over to just them instead of OAI and ANT though like, think for more than a few seconds...
@mikebradleyai Mike Bradley on x
Glad to see you say this. This time last year you released two OS consumer grade models …
@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. 🇺🇸
@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.
@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 😭
@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.
@jpatel41 Jeetu Patel on x
@Cisco is proud be a signatory of this letter. We believe that commitment to open weights models ranging from frontier class LLMs to SLMs is important for maintaining American leadership in AI.
@zephyr_z9 @zephyr_z9 on x
HUH???? Where is the endorsement? [image]
@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. …
@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]
@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.
@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
@andyvan Andy Vandervell on x
mic drop
@mikeisaac Rat King on x
wow. openai decides to sign on to the Nvidia/Microsoft-backed open letter to regulators supporting open source incredible [image]
@sriramk Sriram Krishnan on x
open weight models are how the U.S. wins on AI.
@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 …
@eliebakouch Elie on x
gpt-oss-2 pls 🥺
@gladstein Alex Gladstein on x
Encouraging Would be great if OpenAI supported open-source 🙏
@linamkhan Lina Khan on x
Glad to see renewed attention on open-weight models. We made this case at the @FTC in 2024 …
@finkd Mark Zuckerberg on x
Open source is a positive and important force for both empowering people and preventing centralization. Proud to support this.
@thestalwart Joe Weisenthal on x
American CEOs are signing open letters now. Behavior I used to only associate with concerned academics [image]
@obrien Chris O'Brien on x
Breaking: Dr. Frankenstein wants to ensure he still has proper help in case his monster gets loose again.
@elonmusk Elon Musk on x
Overwhelming support for open source
@deanwball Dean W. Ball on x
I advocated internally for openai to sign this letter, which is consistent with my almost three years of writing mostly supportive things about open weight models. I was writing for an audience that had context for these years of work and did not think about how the tweet would b…
@ns123abc Nik on x
OpenAI literally refused to sign the letter [image]
@minimax_ai @minimax_ai on x
Welcome to X🥳 Thank you for supporting Opensource AI, Jensen!🫶
@suhail @suhail on x
Thank you @sama - This is the way.
@zerohedge @zerohedge on x
Narrator: “he was not, in fact, glad to see this”
@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. …
@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!
@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.
@ccatalini Christian Catalini on x
You know something is important when @JensenHuang pauses torturing talent into greatness to join and share on @X:
@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
@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. …
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Silicon Valley Is Completely Divided Over Chinese AI

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