{"entity":"claude-mythos-preview","name":"Claude Mythos Preview","events":[{"date":"2026-04-07","until":null,"published":null,"recorded":"2026-11-04","predicate":"model_release","value":"Claude Mythos Preview","status":"valid","assertable":true,"id":"clm_8FBB9EF60E7B","evidence":{"by":"page-read","on":"2026-11-04","quote":"April 7, 2026 We announced Claude Mythos Preview is available as a gated research preview for defensive cybersecurity work as part of Project Glasswing .","url":"https://platform.claude.com/docs/en/release-notes/overview"}},{"date":"2026-06-09","until":null,"published":null,"recorded":"2026-11-04","predicate":"deprecated","value":"claude-mythos-preview","status":"valid","assertable":true,"id":"clm_C2876AD1EB33","evidence":{"by":"page-read","on":"2026-11-04","quote":"claude-mythos-preview Deprecated June 9, 2026 To be announced","url":"https://platform.claude.com/docs/en/about-claude/model-deprecations"}}],"complete":true,"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}