# Claude Mythos 5 predecessor

entity: /record/claude-mythos-5.md  
predicate: predecessor  
page: /record/claude-mythos-5/predecessor  
as_of: 2026-11-04  

As of November 4, 2026, Claude Mythos 5's predecessor on the AsOf record is Claude Mythos Preview, dated June 9, 2026, from a primary source (anthropic.com). The record holds 1 claim on Claude Mythos 5's predecessor, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current predecessor

What the record asserts on 2026-11-04.

- [Claude Mythos 5](/record/claude-mythos-5.md) | predecessor | [Claude Mythos Preview](/record/claude-mythos-preview.md) | valid 2026-06-09 to present | conf 0.95 | valid | [clm_7199A0F9C7B1](/claim/clm_7199A0F9C7B1.md)
  sources: https://www.anthropic.com/news/claude-fable-5-mythos-5

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [Claude Mythos 5](/record/claude-mythos-5.md) | predecessor | [Claude Mythos Preview](/record/claude-mythos-preview.md) | valid 2026-06-09 to present | conf 0.95 | valid | [clm_7199A0F9C7B1](/claim/clm_7199A0F9C7B1.md)
  sources: https://www.anthropic.com/news/claude-fable-5-mythos-5

## Questions this record answers

### What is Claude Mythos 5's current predecessor?

Claude Mythos Preview, dated June 9, 2026, from a primary source (anthropic.com). The record asserts this claim as of November 4, 2026 (status valid, confidence 0.95).


## Get this data

- JSON: /v1/entities/claude-mythos-5/predecessor (this fact) · /v1/entities/claude-mythos-5?predicates=predecessor (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: timeline(entity: "claude-mythos-5", predicates: ["predecessor"]) for every dated value · fetch(id: "/record/claude-mythos-5/predecessor.md") for this page
- Entity twin: /record/claude-mythos-5.md · timeline: /timelines/claude-mythos-5.md

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