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On Anthropic’s Mythos Preview and Project Glasswing

Monday, April 13, 2026 at 04:52 PM UTC·Source: Schneier on Security

Updated: Monday, April 13, 2026 at 04:54 PM UTC

Executive Summary

The cybersecurity industry is obsessing over Anthropic’s new model, Claude Mythos Preview, and its effects on cybersecurity. Anthropic said that it is not releasing it to the general public because of its cyberattack capabilities, and has launched Project Glasswing to run the model against a whole slew of public domain and proprietary software, with the aim of finding and patching all the vu

Analysis

The cybersecurity industry is obsessing over Anthropic’s new model, Claude Mythos Preview, and its effects on cybersecurity. Anthropic said that it is not releasing it to the general public because of its cyberattack capabilities, and has launched Project Glasswing to run the model against a whole slew of public domain and proprietary software, with the aim of finding and patching all the vulnerabilities before hackers get their hands on the model and exploit them. There’s a lot here, and I hope to write something more considered in the coming week, but I want to make some quick observations...
Source Attribution

Originally published by Schneier on Security on Apr 13, 2026.

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