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  "path": "/anthropic-started-red-teaming-new-mythos-models-first-results/",
  "publishedAt": "2026-06-05T13:27:26.000Z",
  "site": "https://www.testingcatalog.com",
  "tags": [
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  "textContent": "Anthropic is preparing to release the Claude Mythos model from a new \"Oceanus\" checkpoint, surfaced in early June, with a focus on reasoning, coding, and cybersecurity tasks.",
  "title": "Anthropic started red teaming new Mythos models, first results"
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