Story perspectives

Anthropic Enables Mythos Threat Sharing, Pentagon Deploys Model

5/19/2026

Summary

Anthropic Enables Sharing

Anthropic announced that Mythos users may share threat information with other affected parties.
Mythos, unveiled April 7 under Project Glasswing, gives Amazon, Microsoft, Nvidia and Apple access to the Claude Mythos Preview model.
Anthropic now permits partners to share findings, tools or code with companies, regulators, government agencies, the media or the public.
The Pentagon is deploying Mythos to find and patch software vulnerabilities across the U.S. government.

Summary

CISOs Under Pressure

CISOs face heightened pressure as AI tools Mythos and GPT-5.5 increase fears of AI-driven hacking.
Semgrep CEO Isaac Evans warns that AI threats will cause “a lot more hacking this year.”
Mozilla’s security team and California researchers used Mythos to discover more bugs, fix them, and develop a macOS corruption technique.
OpenAI launched the “Daybreak” portal, allowing developers to request AI-powered security scans.

Summary

Anthropic Briefs Regulators

At Governor Andrew Bailey’s request, Anthropic will brief the Financial Stability Board, central banks and the European Commission on Mythos vulnerabilities, beyond the United States.
The International Monetary Fund warned that frontier AI cut exploitation time and cost, raising systemic risk.
The UK AI Security Institute said Mythos passed the “cooling tower” test 3-out-of-10, a first.
Anthropic plans a London office expansion and a dual listing before its 2026 IPO.

History

Historical Context

June 2010 saw the US-Israel Operation Olympic Games deploy Stuxnet, a worm that halted about 1,000 Iranian centrifuges at Natanz and spread to over 60,000 computers worldwide. Led by US Strategic Command chief James Cartwright and Israel’s Unit 8200, the attack set a precedent for state-sponsored cyber weapons. Today Anthropic’s Mythos AI platform raises similar alarm as regulators consider coordinated AI-security rules.

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Anthropic Enables Sharing

Anthropic announced that Mythos users may share threat information with other affected parties.
Mythos, unveiled April 7 under Project Glasswing, gives Amazon, Microsoft, Nvidia and Apple access to the Claude Mythos Preview model.
Anthropic now permits partners to share findings, tools or code with companies, regulators, government agencies, the media or the public.
The Pentagon is deploying Mythos to find and patch software vulnerabilities across the U.S. government.

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