Samuel Boivin/NurPhoto via Getty Images
By
David DiMolfetta,Cybersecurity Reporter, Nextgov/FCW
By
David DiMolfetta
The access issue comes as the Five Eyes alliance is warning that frontier AI could soon accelerate both cyberattacks and cyber defense.
NSA lost Mythos 5 access after Trump export controls on Anthropic (June 2026). Frontier AI export bans disrupt government security; Five Eyes warns models could reshape cyber threat landscape in months, not years.
Samuel Boivin/NurPhoto via Getty Images
By
David DiMolfetta,Cybersecurity Reporter, Nextgov/FCW
By
David DiMolfetta

Parts of NSA lose Mythos 5 access after White House imposes limits

US intelligence loses Anthropic AI tool amid national security dispute

Anthropic’s powerful Mythos AI reportedly breached ‘almost all’ NSA classified systems within a few hours during red-team test — report sheds more light on the U.S. government's sudden ban on the flagship models

U.S. allows limited access to Anthropic’s Mythos AI model

US allows limited access to Anthropic's Mythos AI model - Latest News

US allows limited access to Anthropic's Mythos AI model after blocking over national security concerns

Anthropic’s Mythos AI Reportedly Hacked the NSA’s Most Sensitive Systems ‘in Hours’

Trump admin allows Anthropic to release Mythos AI model to some companies, government agencies: Reports

Anthropic's Mythos is coming back for a select group of entities approved by the U.S. government

Anthropic wins US approval to restore access to Mythos 5 AI model

The Five Eyes alliance is warning that frontier AI could accelerate cyberattacks and cyber defense.

The US National Security Agency has reportedly lost access to Anthropic's Mythos 5 AI model following export restrictions imposed…

The U.S. eavesdropping agency is reportedly preparing Anthropic's Mythos for use in cyberattacks, despite a federal ban on using…

Access to Fable 5 and Mythos 5 barred for foreign nationals immediately following security evaluation

It was dubbed a supply chain risk a few months ago

U.S. grants limited access to Anthropic's Mythos AI model for cybersecurity firms after previous national security concerns.