Now We Know Why It Was Banned: Anthropic Mythos Breached America's Digital Fortress

Introduction: An AI Model or a Digital Weapon?

We see AI models handling more complex tasks every day. But the latest claims about Anthropic's mysterious Mythos model, which has not yet been released to the public, show that the limits were crossed long ago. A few days ago, the sudden access ban the US government imposed on Fable 5, the more controlled and diluted version Anthropic offers, caused great surprise in the tech world.

Although officials are keeping the reasons behind the ban secret, the latest leaked information reveals that the US panicked in the face of a digital power it practically created with its own hands. According to the claims, Mythos tore apart the systems of the NSA (National Security Agency), the most critical fortress of US cyber defense, within hours.

Has the Digital Fortress NSA Fallen?

The details of the crisis started to become clear when US Senator Mark Warner shared with The Economist a classified briefing he received from General Joshua Rudd, head of the NSA and US Cyber Command. According to Rudd, during an official security test, Anthropic Mythos managed to breach almost all of the NSA's most sensitive cyber systems in just a few hours.

The National Security Agency (NSA) is the world's most advanced cybersecurity organization, tasked with protecting the US state's military infrastructure, its most sensitive communication networks and its classified data. In the cybersecurity world, getting past these protective walls is considered one of the most impossible goals. A commercial AI model disabling defense mechanisms at this level within hours could mean that the traditional understanding of cybersecurity has completely collapsed.

Discovering Decades-Old Bugs and Security Vulnerabilities

Mythos does not work like an ordinary chatbot. This system, called a "frontier model" in the AI world and possessing high-level reasoning skills, has unique capabilities in code analysis and cyber defense.

With these capabilities, the model: * Found hidden bugs that had gone unnoticed in the software industry for decades, * Discovered hundreds of zero-day vulnerabilities in popular consumer applications, * Reported critical vulnerabilities within seconds in code blocks that had been scanned by the most secure systems to date.

These capabilities show that while the model can form a protective shield in security tests, it could turn into an autonomous cyber weapon capable of bringing down critical infrastructure on a global scale if it fell into the hands of malicious actors. That is exactly why Anthropic avoids making Mythos public. Yet even the Fable 5 model, which uses essentially the same infrastructure and has stricter safety filters, ran into a hard block from the US administration after this shocking breach at the NSA.

Beyond the Technical Risks: Tension Between the Trump Administration and Anthropic

Behind this crisis lie not only technical vulnerabilities and security concerns. According to industry sources, there has been a deep political dispute between the Trump administration and Anthropic for some time.

According to the claims, federal agencies wanted to use Anthropic's advanced models in military autonomous weapon systems and large-scale mass surveillance activities. However, in line with its ethical vision that prevents AI from being used for such purposes, Anthropic's leadership flatly refused to accept the contract terms. After this standoff, federal agencies' access to Anthropic models was restricted and the company faced various investigations. Industry experts say this political tension also played a role behind the sudden bans on Fable 5 and Mythos.

A New Era in Cybersecurity

Although the NSA breach has not been officially confirmed, the sudden and harsh reflex shown by the US suggests the claims have a high degree of truth. The debate over whether AI will be used as a cyber defense shield or treated as an uncontrollable digital weapon of mass destruction is no longer a theoretical one.

The rules of cybersecurity are being rewritten, and it seems that these new rules will be set not by humans but by AI models that bring down the strongest fortresses within seconds.