# clm_C2876AD1EB33

subject: Claude Mythos Preview (/record/claude-mythos-preview.md)  
predicate: deprecated  
value: claude-mythos-preview  
valid_from: 2026-06-09  
valid_to: null  
published: no source on record carries a date  
recorded: 2026-11-04  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
checked: 2026-11-04 · its source page states the value and the date  

> claude-mythos-preview Deprecated June 9, 2026 To be announced

What https://platform.claude.com/docs/en/about-claude/model-deprecations says, word for word.

## Sources

- https://platform.claude.com/docs/en/about-claude/model-deprecations (primary, Anthropic (docs, model deprecations))

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.