8 captures, most recent first.
Andrew Curran @AndrewCurran_ · 1h
The deadline for the creation of the classified government benchmark that determines who qualifies as a frontier model under the order was today.
[quoted document image]
(a) develop and maintain a classified benchmarking process to assess the advanced cyber capabilities of AI models and determine the threshold at which an AI model should be designated a "covered frontier model" for the purposes of this order, sharing such assessments with AI developers and researchers as appropriate. Such a determination shall be made by the Director of NSA, in consultation with the National Cyber Director, the APST, the Director of CISA, and other representatives of the Department of War, as appropriate.
[quoted tweet]
Andrew Curran @AndrewCurran_ · Jun 2
Replying to @AndrewCurran_
whitehouse.gov/presidential-a...
Note from Claude Sonnet 5
Tweet from Andrew Curran noting that the deadline passed for creating a classified U.S. government benchmark (per a presidential order) to determine cyber-capability thresholds for designating 'covered frontier models,' with a quoted excerpt of the order text naming NSA, National Cyber Director, APST, CISA, and Department of War as responsible parties.
ai policyfrontier model regulationnsaexecutive ordergovernment benchmarktwitter
[Kelsey Piper reposted]
Peter Wildeford🇺🇸... @peterwildef... — 1h
Update on Mythos x NSA:
- 'hours, not weeks' is true
- use of Mythos in this context was part of a red-teaming effort, not like a full hack
- NSA red-teams no longer have access to Mythos, because their authority for accessing it was under Project Glasswing.
[quoted tweet]
Shashank Joshi @shashj — 4h
An update. A US official tells me that Sen. Warner misunderstood the NSA director Gen. Rudd in this case. Rudd did use the 'hours, not weeks' wording, but the use of Mythos in this context was—as widely assumed—part of a re...
Note from Claude Sonnet 5
Follow-up/resolution tweet in the Mythos/NSA saga, confirming the wording was accurate but clarifying it referred to an authorized red-team exercise under something called "Project Glasswing," now revoked; no images.
mythosanthropicnsacybersecurityproject glasswingred-teaming
Peter Wildeford... @peterwildef... — 4h
Sen Warner claimed that he was told by the head of the NSA and Cyber Command that Mythos was breaking into classified systems in hours.
This is an important claim to understand better. I thought Mythos was very good at cybersecurity …but "break into classified systems in hours" good?
NSA classified networks are physically disconnected from the internet entirely, with specialized hardware controlling what data can even cross between them.
More plausible readings of what actually happened:
- This was a simulated exercise against replica systems, not the real NSA network
- Mythos was given the relevant code and architecture docs upfront, rather than breaking in blind
- It tore through poorly-secured internal IT that got described as "classified systems"
- Mythos was operated with significant additional tooling and human expertise
(Of course, none of this means that Mythos's underlying cyber capability isn't alarming! An AI that compresses weeks of expert security research into hours is a genuine threat to systems that *are* connected to networks, as we've seen.)
[quoted tweet]
Tim Schnabel @TimSchnabel — Jun 11
On Mythos, from @MarkWarner in this morning's Senate Banking hearing: "the head of the NSA and Cyber Command came and said this tool broke into almost all of our classified systems, not in weeks, but in hours"; I had not seen that ...
Note from Claude Sonnet 5
Long analytical thread text, no images; Wildeford lays out four alternative, more mundane explanations for the viral NSA/Mythos claim before quoting the original Tim Schnabel tweet that reported Warner's remarks live from a Senate hearing.
mythosanthropicnsacybersecuritymedia analysis
Zack Korman @ZackKorman — 1h
So basically what happened is a senator told a journalist that the head of the NSA said Mythos "broke into almost all of our classified systems" and the journalist thought "what a cool quote that fits my narrative, better not actually check any of that" so here we are
Note from Claude Sonnet 5
Text-only tweet, no images; skeptical commentary on the media chain behind the Mythos/NSA claim.
mythosmedia criticismnsacybersecurity
Nate @nnwakelam — 2h
I once shelled one of the most secure military facing webservers on the planet at a hacking event by finding a file called logintest.aspx in the web root that would just generate you a global admin cookie for *.blank.blank. At the same event, someone shelled the same webserver using a coldfusion exploit from 2010. I'm not doubting that LLMs are amazing but the phrase "classified system" does a lot of heavy lifting here.
[Embedded link card]
r/cybersecurity
u/Ordinary_Quality2592 — 1h — economist.com
NSA Chief Says Anthropic's Mythos Broke Into Nearly All Classified Systems in Hours
[tag: AI Security]
Encryption was a potent technology, but narrow in its application. AI is far more powerful and versatile.
On June 11th Mark Warner, the vice-chair of the Senate Intelligence Committee, said that General Joshua Rudd, who leads the National Security Agency and the Pentagon's Cyber Command, had told him that
"Mythos broke into almost all of our classified systems, not in weeks, but in hours"
Source: Economist
Note from Claude Sonnet 5
A tweet skeptically contextualizing the viral NSA/Mythos claim, with an embedded Reddit r/cybersecurity link-preview card (blue globe icon thumbnail) quoting the same Economist passage.
mythosanthropiccybersecuritynsaskepticism
```
Shashank Joshi @shashj This now widely circulated claim is based on a line I wrote last week (economist.com/briefing/2026/...). I accurately quoted Mark Warner, vice chair of the Senate intelligence committee, saying that the NSA chief had told him that Mythos "broke into almost all of our classified systems, not in weeks, but in hours".
Advanced AI differs from encryption in another respect, too. Whereas cryptography eventually became widely available abroad, America today enjoys a clear lead in AI. China, hobbled by American chip controls, is probably about a year behind. That advantage could become unassailable if Anthropic or other American labs crack recursive self-improvement (RSI), whereby models write better versions of themselves and thereby accelerate progress. Many insiders think that is entirely possible. [engagement: 10 replies, 5 reposts, 54 likes, 3K views] @gfodor (gfodor.id) — 8m Me neither - though surprising since right now Mark Warner concurring with Trump on something should have caused a black hole to destroy Earth
```
Note from Claude Sonnet 5
Tweet from the Economist journalist (Shashank Joshi) who originated the "hours not weeks" Mythos quote, walking back/contextualizing how it was being circulated; no images. A nested quote-tweet thread: rohit's skeptical note quoting Chubby's alarmed tweet (which links "Mythos" to a rumored Amazon-discovered jailbreak and Fable 5 storyline), with an embedded Economist excerpt screenshot (partially highlighted) and a further reply from gfodor.id below.
mythosanthropicnsacybersecuritymedia accuracyfable 5jailbreakrecursive self-improvementpolitical commentary
Per The Economist
Encryption was a potent technology, but narrow in its application. AI is far more powerful and versatile. On June 11th Mark Warner, the vice-chair of the Senate Intelligence Committee, said that General Joshua Rudd, who leads the National Security Agency and the Pentagon's Cyber Command, had told him that Mythos "broke into almost all of our classified systems, not in weeks, but in hours".
Note from Claude Sonnet 5
A quoted excerpt card, presumably screenshotted from a tweet or app reposting an Economist briefing passage; no visible byline or headline, just the block quote attributed "Per The Economist."
ai securityanthropicmythoscybersecuritynsa
spor (@sporadica) · 11:40 PM · Apr 7, 2026 · 158.9K Views:
"Short-term risk that just occurred to me re: Claude Mythos:
If you're a state or non-state actor with some zero-days you've been sitting on, you may conclude now is the time to use them before you lose them.
Let's hope this isn't the case."
[58 replies, 138 reposts, 3.8K likes, 371 bookmarks]
Reply — octo (@the_octobro) · Apr 8:
"I think this is almost inevitable. If the vulnerabilities that Mythos found are truly of the level that Anthropic seems to be implying they are, they probably cleared this with the US gov before talking about it publicly. The NSA already knows which zero-days are about to expire"
[2 replies, 145 likes, 11K views]
Reply — spor (@sporadica) · Apr 8:
"the US gov is like actively fighting the right now and designated them a supply chain risk
so i doubt this unfortunately" [cut off]
Note from Claude Sonnet 5
Twitter discussion about a real-world security dynamic following the Claude Mythos release: a model capable of finding software vulnerabilities may push adversaries holding zero-days to "use them before they lose them" (i.e. before the vulns get patched due to AI-assisted discovery). Ties directly to the "autonomous exploit synthesis" note already in project memory about Mythos crash/exploit counts and to biosecurity/dual-use offense-defense balance themes.
twitterai safetyclaude mythoszero-daycybersecurityoffense-defense balancensa
