> ## Content Index > Fetch the complete content index at: https://www.implicator.ai/llms.txt > Use this file to discover other available public pages before exploring further. # NSA Loses Anthropic Mythos Access After June Export-Control Order - URL: https://www.implicator.ai/nsa-loses-anthropic-mythos-access-after-june-export-control-order/ - Published: 2026-06-24T14:10:35.000Z - Updated: 2026-06-24T14:10:35.000Z - Description: NSA analysts lost at least some Mythos access after a June export-control order, even as officials clarified the model found vulnerabilities in a controlled red-team test rather than breaking into classified systems from the outside. The access fight now hits U.S. cyber defense. - Author: Marcus Schuler - Tags: AI News The National Security Agency lost access to Anthropic's Mythos 5 after the Trump administration's June export-control directive forced the company to pull back its most advanced models, [The New York Times reported](https://www.nytimes.com/2026/06/23/us/politics/nsa-lost-access-anthropic-tool.html?ref=implicator.ai) Tuesday, citing U.S. officials. The cutoff hit analysts who had been testing the cybersecurity model inside the agency, where officials said it had found software weaknesses faster than expected. The new reporting narrows a story that had moved through Washington in a more alarming form. Sen. Mark Warner, the top Democrat on the Senate Intelligence Committee, said at a June 11 hearing that NSA Director Gen. Joshua Rudd had told him Mythos "broke into almost all of our classified systems, not in weeks, but in hours." Officials later told the Times and the Associated Press that the statement referred to a controlled red-team exercise, not an outside breach of NSA networks. Key Takeaways - The NSA lost at least some access to Anthropic Mythos 5 after the June export-control directive. - Officials clarified that Mythos found vulnerabilities in a controlled red-team test, not an outside breach of classified systems. - Nextgov/FCW reported some analysts were told Friday that access would end, though earlier versions may remain available under prior arrangements. - The cutoff lands as Five Eyes cyber agencies warn defenders need to adopt AI on a timeline measured in months. AI-generated summary, reviewed by an editor. [More on our AI guidelines](https://www.implicator.ai/about/). ## Analysts were notified after the directive Parts of the NSA lost Mythos access after the administration acted against Anthropic this month, [Nextgov/FCW reported](https://www.nextgov.com/artificial-intelligence/2026/06/parts-nsa-lose-mythos-5-access-amid-anthropic-supply-chain-dispute/414366/?ref=implicator.ai), citing two people familiar with the matter. Some analysts were told Friday that access would end, one of the people said. The agency may still be able to use earlier versions under prior arrangements, although support, updates or modifications could be more limited, the second person told the outlet. Anthropic said on June 13 that it had received a government directive at 5:21 p.m. Eastern requiring it to suspend Fable 5 and Mythos 5 access for any foreign national, including noncitizen employees inside the United States. The company said it disabled the models for all customers because it could not comply selectively. The order came days after the company released Fable 5 more widely while keeping Mythos tightly restricted. ## Warner's quote came from a red-team test The red-team detail matters because it changes the technical claim. A U.S. official told the Associated Press that Anthropic's model identified vulnerabilities in highly sensitive government systems within hours during a testing exercise, but that did not mean the model exploited them within that time. The Times reported that NSA red teams began inside classified systems designed to be reachable only from certain computers and cut off from the wider internet. That setup made the test useful for defenders and poor evidence of a model breaking into classified systems from scratch. Red teams are authorized testers who probe networks so an agency can fix problems before real attackers use them. Officials still told the Times that NSA analysts were struck by Mythos's performance in the controlled environment, where it exceeded expectations for finding flaws. Track AI security policy before it moves Strategic AI news from San Francisco. No hype, no "AI will change everything" throat clearing. Just what moved, who won, and why it matters. Daily at 6am PST. Email address Subscribe Check your inbox. Click the link to confirm. No spam. Unsubscribe anytime. ## Glasswing becomes the access problem The access loss appears tied to Project Glasswing, Anthropic's restricted program for early Mythos use by security researchers, companies and government-linked defenders. Anthropic launched the effort in April, later widening it to roughly 150 organizations in more than 15 countries. Nextgov cited an Economist editor's post saying NSA red teams lost access because their authority to use Mythos came through Glasswing. Know someone who'd find this useful? [✉️ Email it to a friend in one click](mailto:?subject=A%20newsletter%20I%20think%20you%27d%20like&body=This%20is%20one%20of%20maybe%20three%20newsletters%20I%20actually%20read.%20The%20rest%20just%20pile%20up%2C%20unread%2C%20judging%20me.%0A%0AAnd%20yes%2C%20this%20email%20mostly%20wrote%20itself%2C%20which%20is%20a%20little%20on%20the%20nose%20for%20an%20AI%20newsletter.%20Doesn%27t%20make%20it%20wrong.%20implicator.ai%20is%20good.%0A%0ASubscribe%20free%3A%20https%3A%2F%2Fwww.implicator.ai%2Fsubscribe%2F%3Futm%5Fsource%3Dnewsletter%26utm%5Fmedium%3Dforward%26utm%5Fcampaign%3Demail%5Fforward), or they can [subscribe free here](https://www.implicator.ai/subscribe/?utm%5Fsource=newsletter&utm%5Fmedium=forward&utm%5Fcampaign=forward%5Fto%5Fcolleague). The cutoff follows months of conflicting U.S. government positions on Anthropic. The Pentagon labeled the company a supply-chain risk earlier this year after a fight over military-use terms, while the NSA and other agencies kept testing the company's most cyber-capable model. The Implicator previously covered that split when the agency was [reported to be using Mythos despite the Pentagon label](https://www.implicator.ai/nsa-uses-anthropic-mythos-while-pentagon-calls-it-supply-chain-risk/) and again when Anthropic [embedded engineers at the NSA](https://www.implicator.ai/anthropic-embeds-engineers-in-the-nsa-to-deploy-mythos-for-offensive-cyber/). ## Five Eyes agencies warn on timing The timing sharpened the contrast with cyber agencies' warning that defenders need to adopt AI quickly. On Monday, the United States, Britain, Canada, Australia and New Zealand issued a Five Eyes statement warning that frontier AI models could change offensive and defensive cyber work on a timeline measured in months. "Adversaries are already using AI to move faster and more effectively," the agencies said. "Defenders must do the same." Anthropic and government officials are still trying to resolve the export-control issue, according to the Times. A classified contract that would let the NSA use Anthropic technology for intelligence analysis and vulnerability detection has not been finalized, and some Pentagon officials want the agency to work with other models. For now, the practical result is narrower: the same agency that tested Mythos against its own systems has lost at least part of the tool it was using to find what needed fixing. Frequently Asked Questions What happened to the NSA's Mythos access? Parts of the National Security Agency lost access to Anthropic's Mythos 5 after the U.S. export-control directive forced Anthropic to restrict Fable 5 and Mythos 5 access. Did Mythos break into classified NSA systems? Officials told the Times and the Associated Press that the widely quoted claim referred to a controlled red-team exercise. Mythos identified vulnerabilities within hours, but officials said that did not mean it broke in from the outside or exploited the systems on its own. What is Project Glasswing? Project Glasswing is Anthropic's restricted cybersecurity program for giving selected companies, researchers and government-linked defenders early access to Mythos for vulnerability discovery and defense work. AI-generated summary, reviewed by an editor. [More on our AI guidelines](https://www.implicator.ai/about/). [US Export Controls Force Anthropic to Pull Fable 5 and Mythos 5 Days After LaunchCommerce Secretary Howard Lutnick sent Anthropic chief executive Dario Amodei a letter on Friday placing the company's Fable 5 and Mythos 5 models under export controls, barring their use by any foreiThe Implicator![](https://www.implicator.ai/content/images/2026/06/2026-06-13-07.13.16-anthropic_model_lockdown@2x.webp)](https://www.implicator.ai/us-export-controls-force-anthropic-to-pull-fable-5-and-mythos-5-days-after-launch/) [Anthropic Embeds Engineers in the NSA to Deploy Mythos for Offensive CyberAnthropic put about six engineers inside the NSA to deploy Mythos, the cyber model it calls too dangerous to release, for offensive operations, the FT reported.The Implicator![](https://www.implicator.ai/content/images/2026/06/2026-06-05-07.03.11-nsa_mythos_cyber@2x.webp)](https://www.implicator.ai/anthropic-embeds-engineers-in-the-nsa-to-deploy-mythos-for-offensive-cyber/) [NSA Tests Anthropic Mythos on Microsoft Software, Report SaysBloomberg says the NSA is testing Claude Mythos Preview against Microsoft software while the White House weighs wider federal access.The Implicator![](https://www.implicator.ai/content/images/2026/05/2026-05-01-05.16.12-nsa_mythos_clean@2x.webp)](https://www.implicator.ai/nsa-tests-anthropic-mythos-on-microsoft-software-report-says/)