US appeals court upholds Pentagon blacklisting of Anthropic
34 sources · Breaking News, Latest News and Videos · Ars Technica · Ars Technica AI- Doom: DC Circuit appeals court ruled Pentagon can legally blacklist Anthropic as a supply chain risk
- Doom: Judges said "overly constrained AI models" could cause military operations to fail
- Doom: Blacklisting stems from Anthropic refusing to enable specific features in its Claude model
- Neutral: Pentagon designated Anthropic a national security supply chain risk before the court challenge
- Neutral: Ruling was issued September 25, 2026, rejecting Anthropic's bid to overturn the designation
The story in full
A US federal appeals court ruled on September 25, 2026 that the Pentagon may designate Anthropic a supply chain risk, declining to block the blacklist the Defense Department had placed on the AI company. The DC Circuit court sided with the government, and Ars Technica reported that the ruling centered on Anthropic's refusal to enable certain features in its Claude AI model, with judges stating that "overly constrained AI models" could cause military operations to fail.
The Pentagon's blacklist label, which carries national security implications, had been challenged by Anthropic in court. The dispute pits the Defense Department's demand for unconstrained AI capabilities against Anthropic's decisions about how its Claude model is configured and what features it makes available.
Analysis
440 wordsOn September 25, 2026, the DC Circuit Court of Appeals ruled that the Pentagon may legally designate Anthropic a supply chain risk under national security law, rejecting Anthropic's bid to overturn the label. The court declined to block the Defense Department's blacklisting of the company, with judges stating in their ruling that "overly constrained AI models" could cause military operations to fail. The decision was reached by a 2-1 margin, meaning one judge dissented. The dispute centers on Anthropic's refusal to enable specific features in its Claude model, features the Pentagon has argued are necessary for its operations.
The ruling carries significant weight beyond the immediate legal outcome. A national security supply chain designation affects a company's ability to do business with the federal government and signals broader reputational and contractual risk. The core dispute is genuinely contested: whether a private AI company's choices about how its model behaves, choices rooted in its stated safety commitments, can be treated as a national security threat when those choices conflict with what a government agency wants the model to do. That question has no settled legal precedent, and the 2-1 split suggests the legal reasoning is not airtight. Anthropic has indicated it is reviewing its options following the decision.
The Anti-AI camp, broadly speaking, does not celebrate Anthropic here. Reactions from accounts like Cathy Gellis and Social Media Lab frame the ruling as the government weaponizing national security law to punish a company for maintaining guardrails, with Gellis writing that the designation came because Anthropic "wouldn't let Hegseth do terrible things with Claude." The account 0xbadcafebee described the ruling as autocracy, while D. Vader summarized the implied lesson as rewarding companies that are "evil and productive" over those that are "benevolent and lazy." Middle-ground voices are more divided. DataFire described the ruling as reinforcing the military's control over AI weaponization, while the account exabrial argued that AI safety filters can be exploited by adversaries, lending some credibility to the Pentagon's position. Jonathan noted that the designation complicates rather than ends Anthropic's relationship with the Trump administration. The Pro-AI camp has posted no reactions to this ruling; that camp would typically argue that restricting AI capabilities through corporate guardrails is itself a risk, and that government access to fully capable AI systems is a matter of competitive necessity.
The clearest thing to watch is whether Anthropic pursues a further appeal or seeks en banc review of the 2-1 decision, either of which could reopen the legal question. Any negotiated resolution between Anthropic and the Defense Department over which specific Claude features are at issue would also shift the terms of the standoff considerably.
What Anti-AI voices are sayingAlarm voices see the ruling as politically motivated retaliation against Anthropic for refusing to remove AI guardrails, with many arguing the government weaponized national security law against a domestic company to force compliance. A notable minority thinks all AI poses supply chain risks regardless of company.
Quote 1 of 13What Middle Ground voices are sayingMiddle-ground reactions acknowledge the government has legitimate reasons to avoid dependence on privately controlled software with built-in restrictions, but many see the designation as an overreach. Several note the 2-1 split decision and strong dissent make further legal challenge likely.
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More Anti-AI reactions (12)
“The US government took a legal designation explicitly crafted to protect against foreign adversaries and deployed it against a private, domestic entity, to their immediate and great detriment.”
iamEAP, Hacker News · 18:46 UTC“how this isn't seen as an open and shut case of vindictive prosecution (if that's even a thing for this branch of law?) is astounding. The administration couldn't have made it more obvious there was no merit to their designation”
ctippett, Hacker News · 16:58 UTC“This smells like corruption to me. OpenAI has hacked several prominent entities and is allowed to do business as usual but Anthropic putting guardrails on the military's usage of AI is the national security threat”
prometheus1992, Hacker News · 16:55 UTC“Opinion by Katsas and Rao. For those that don’t follow this regularly, those are two of the biggest Trump hacks on the bench. I suspect this will be reversed en banc. Anthropic’s argument is really clear and easy to understand:”
romellem, Hacker News · 17:02 UTC“All AI is a supply chain risk. I think people should know that about now. You can't keep it in a box.”
Sparkyte, Hacker News · 18:53 UTC“the core point is that this is the US being stupid, again.”
jmward01, Hacker News · 19:39 UTC“What's to stop a Democratic president from doing the same thing and destroying them?”
iamdelirium, Hacker News · 16:20 UTC“If the CEO of any other defense contractor did this, they'd be summarily fired by the board.”
infamouscow, Hacker News · 16:26 UTC“look what Grok did to hundreds of Iranian children”
ck2, Hacker News · 17:21 UTC“I agree with its designation. The security scans from Claude Mythos have been highly suspicious, wrong, and with a significant false positive rate. Claude also directly causes conflict within teams through excessive utility of "git blame" which weaponizes everyone against”
kittikitti, Hacker News · 16:40 UTC“This is more about wringing Anthropic's hand to agree for handful of defense companies to be the official AI translators to government.”
FlyingBears, Hacker News · 17:54 UTC“The impact of AI might be significant/belligerent/virulent”
frogger8, Hacker News · 19:12 UTC
More Middle Ground reactions (12)
“Anthropic tried to build safeguards and out-regulate the government. Everyone here should know that such limitations would (can and have, see some famous IFF spoofing incidents) be exploited by an enemy, which is generally why they aren't acceptable in a”
exabrial, Hacker News · 18:50 UTC“I don’t agree with the decision, but I don’t think courts should be able to easily overturn the federal government’s findings when it comes to national security in a specific decision like this.”
gip, Hacker News · 17:24 UTC“You can agree with the rules anthropic wanted, but having rules set by a private company at all that apply to the military does seem fair for the military to object to.”
ApolloFortyNine, Hacker News · 17:08 UTC“I guess it’s the supreme court next. For all the downsides of losing the business of government contractors, it really would hold Anthropic to their stated values: they’ll never develop AI controlled weapons on this blacklist.”
Chance-Device, Hacker News · 16:55 UTC“The hidden upside for Anthropic is now they won't be forced to refer to AI as "SI".”
cosmicgadget, Hacker News, skeptic · 18:13 UTC“This was not a good panel for Anthropic, but they did get a strong dissent from Judge Henderson, which should help when seeking en banc review.”
Bob Loeb, Bluesky · 17:59 UTC“Claude and other "big" LLMs have filters so they will do everything they can to avoid reading or writing "harmful" or "adult" content. This is part of the "public liability" thing that Anthropic and other AI companies claim to honor.”
Elf M. Sternberg, Bluesky · 18:34 UTC“being a federally designated security risk only *complicates* an AI developer's Trump administration ties, rather than ending them”
Jonathan, Bluesky · 21:20 UTC“An appeals court upheld the Defense Department’s decision to exclude Anthropic from its supply chain after Anthropic refused to remove Claude safeguards for autonomous lethal weapons and mass surveillance.”
Law Briefly, Bluesky · 17:45 UTC“An appeals court upheld the Defense Department’s decision to exclude Anthropic from its supply chain after Anthropic refused to remove Claude safeguards for autonomous lethal weapons and mass surveillance.”
US Politics Briefly, Bluesky · 17:44 UTC“With split rulings across courts, this legal fight over AI supply chain risk is far from settled.”
Go K'awiil - Tech News, Bluesky · 16:30 UTC“if they are labeling Anthropic an NS threat because they hurt Trump's widdle feelins, then he will need to show proof how and why.”
Vivalavoices, Bluesky · 18:47 UTC
Sources
37 articles from 34 outlets- Breaking News, Latest News and VideosFederal appeals court upholds Pentagon designation of Anthropic as supply chain risk - ABC News
- Ars TechnicaCourt rules Trump can blacklist Anthropic for refusing to enable Claude features
- Ars Technica AICourt rules Trump can blacklist Anthropic for refusing to enable Claude features
- news8000.comFederal appeals court rules Pentagon’s blacklist of Anthropic was legal
- Informat.roA Washington court upholds the Pentagon’s ban on Anthropic amid concerns over the military use of its Claude model
- Broadband BreakfastFederal Court Says Pentagon Can Label Anthropic a Supply Chain Risk
- upi.comAppeals court sides with Pentagon on labeling Anthropic security risk
- Washington TimesAppeals court rules Defense Department can blacklist AI company Anthropic
- NewsdayFederal court says Pentagon can label Anthropic a supply chain risk
- Hartford CourantFederal court says Pentagon can label Anthropic a supply chain risk
- thedailyrecord.comUS appeals court upholds Pentagon’s blacklisting of Anthropic
- WSJU.S. Appeals Court Upholds Pentagon Labeling Anthropic a Security Risk
- notus.orgFederal Appeals Court Rejects Anthropic’s Challenge to Pentagon Blacklist
- Laredo Morning TimesFederal court says US government can label Anthropic a supply chain risk
- Al JazeeraUS court upholds Pentagon’s blacklisting of Anthropic
- orlandosentinel.comFederal court says US government can label Anthropic a supply chain risk
- qz.comFederal appeals court upholds Pentagon's blacklisting of Anthropic in AI dispute
- CT InsiderFederal court says US government can label Anthropic a supply chain risk
- Google NewsFederal court says US government can label Anthropic a supply chain risk - the-journal.com
- YourCentralValley.comFederal court says US government can label Anthropic a supply chain risk
- guardonline.comFederal court says US government can label Anthropic a supply chain risk
- ReutersAnthropic's Pentagon blacklist upheld in US appeals court: How the conflict unfolded
- DemócrataA U.S. court endorses that Anthropic be considered a risk to the supply chain.
- Latest news from AzerbaijanU.S. court affirms Pentagon’s decision to label Anthropic a supply chain risk
- France 24US court refuses to overturn Pentagon ban on Anthropic
- abcnews.comFederal appeals court declines to block Pentagon from blacklisting Anthropic - ABC News
- WSJU.S. Appeals Court Upholds Pentagon Labeling Anthropic a Security Risk
- pluang.comCourt upholds Pentagon's blacklist of AI firm A...
- The HillD.C. appeals court sides with Pentagon on blacklist of Anthropic
- Investing.comUS appeals court declines to block Pentagon’s blacklisting of Anthropic By Reuters
- CNBCU.S. appeals court upholds Pentagon designation of Anthropic as supply chain risk
- ReutersUS appeals court declines to block Pentagon's blacklisting of Anthropic
- CNBCU.S. appeals court upholds Pentagon designation of Anthropic as supply chain risk
- PoliticoAppeals court allows Pentagon to label Anthropic a national security risk
- U.S. News & World ReportUS Appeals Court Declines to Block Pentagon's Blacklisting of Anthropic
- Bloomberg.comAnthropic Faces Court Setback Over US Supply Chain Risk Label
- Breakingthenews.netCourt upholds Pentagon's decision to blacklist Anthropic

