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  "path": "/260413/p20#a260413p20",
  "publishedAt": "2026-04-13T14:50:08.000Z",
  "site": "http://www.techmeme.com",
  "tags": [
    "AI Security Institute",
    "Cybersecurity analysis: Claude Mythos Preview had a 73% success rate on expert-level capture-the-flag challenges, which no model could finish before April 2025"
  ],
  "textContent": "AI Security Institute:\n**Cybersecurity analysis: Claude Mythos Preview had a 73% success rate on expert-level capture-the-flag challenges, which no model could finish before April 2025** — The AI Security Institute (AISI) conducted evaluations of Anthropic's Claude Mythos Preview (announced on 7th April) to assess its cybersecurity capabilities.",
  "title": "Cybersecurity analysis: Claude Mythos Preview had a 73% success rate on expert-level capture-the-flag challenges, which no model could finish before April 2025 (AI Security Institute)"
}