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A hand holds a smartphone showing the Claude Mythos app logo against a dark backdrop with Anthropic's orange burst symbol.
Policy·

Anthropic is sending Mythos 5, the model it called too dangerous, to cyberdefenders and the US government

Mythos 5 is the same model as Fable 5 with cyber safeguards lifted, going to Project Glasswing defenders and, Anthropic says, ~150 orgs across 15+ countries.

Illustration for Anthropic's Project Glasswing, a cybersecurity program powered by Claude Mythos Preview
AI·

NSA is running Anthropic's Mythos. The Pentagon says Anthropic is a supply-chain risk.

Axios reports the NSA is using Anthropic's unreleased Mythos model even though the Defense Department has blacklisted Anthropic. One government, two positions.

Abstract visualization of cybersecurity and AI defense systems
AI·

OpenAI launches GPT-5.4-Cyber for defensive security, opens access to thousands

OpenAI's new cybersecurity-tuned model can reverse-engineer binaries and analyze malware. It's restricted to verified defenders through the Trusted Access program.