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Anthropic's Mythos AI Cracked 'Almost All' US Classified Systems in Hours, NSA Chief Reportedly Said

The claim remains unconfirmed, and officials have not disclosed which classified systems were affected or how extensive the alleged access was.

  • On June 11, Senator Mark Warner, vice-chair of the Senate Intelligence Committee, stated that General Joshua Rudd, director of the National Security Agency and Cyber Command, told him Anthropic's AI model Mythos breached classified systems.
  • President Trump moved to block foreign access to Anthropic's two most advanced models, Mythos and Fable, concurrent with the warning amid national security concerns.
  • Rudd told Warner the model "broke into almost all of our classified systems, not in weeks, but in hours." Anthropic had previously restricted Mythos Preview access in April due to sensitivity.
  • Helen Toner of Georgetown University's Centre for Security and Emerging Technology warned that preventing foreign nationals from accessing the models is likely unsustainable, effectively halting AI research.
  • Former British security minister Tom Tugendhat noted that nations will question how to achieve sovereignty after such a clear lesson, while uncertainty remains over how America intends to manage this technological asset.
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Center

Tests conducted on the latest AI Mythos 5 of the company have demonstrated its unprecedented capabilities in cyber attacks, writes The Economist.

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Right

Claims about the capabilities of the artificial intelligence model raise concerns about the future of cyberattacks and the protection of critical infrastructure

A statement by Senator Mark Warner, claiming that Anthropic's AI Mythos infiltrated NSA systems in a matter of hours, provoked a heated controversy. Out of context, this explosive information was actually hiding a controlled security test, revealing the power of new technologies and reviving debate on their regulation.

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  • 34% of the sources lean Left, 33% of the sources are Center, 33% of the sources lean Right
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Memeburn broke the news on Sunday, June 21, 2026.
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