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  "path": "/blog/archives/2026/05/how-dangerous-is-anthropics-mythos-ai.html",
  "publishedAt": "2026-05-14T11:04:27.000Z",
  "site": "https://www.schneier.com",
  "tags": [
    "Uncategorized",
    "AI",
    "hacking",
    "laws",
    "LLM",
    "patching",
    "regulation",
    "vulnerabilities",
    "announcement",
    "select group",
    "found"
  ],
  "textContent": "Last month, Anthropic made a remarkable announcement about its new model, Claude Mythos Preview: it was so good at finding security vulnerabilities in software that the company would not release it to the general public. Instead, it would only be available to a select group of companies to scan and fix their own software.\n\nThe announcement requires context—but it contained an essential truth.\n\nWhile Anthropic’s model is really good at finding software vulnerabilities, so are other models. The UK’s AI Security Institute found that OpenAI’s GPT-5.5, already generally available, is comparable in capability. The company Aisle ...",
  "title": "How Dangerous Is Anthropic’s Mythos AI?"
}