# Claude 3 Sonnet retirement

entity: /record/claude-3-sonnet.md  
predicate: retired  
page: /record/claude-3-sonnet/retired  
as_of: 2026-11-04  

As of November 4, 2026, the AsOf record says Claude 3 Sonnet was retired on July 21, 2025 (as claude-3-sonnet-20240229), from a primary source (platform.claude.com). The record holds 1 claim on Claude 3 Sonnet's retirement, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current retirement

What the record asserts on 2026-11-04.

- [Claude 3 Sonnet](/record/claude-3-sonnet.md) | retired | claude-3-sonnet-20240229 | valid 2025-07-21 to present | conf 0.95 | valid | [clm_7A0BF69A4663](/claim/clm_7A0BF69A4663.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations

## Every dated value

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 Superseded claims stay visible.

- [Claude 3 Sonnet](/record/claude-3-sonnet.md) | retired | claude-3-sonnet-20240229 | valid 2025-07-21 to present | conf 0.95 | valid | [clm_7A0BF69A4663](/claim/clm_7A0BF69A4663.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations

## Questions this record answers

### When was Claude 3 Sonnet retired?

On July 21, 2025 (as claude-3-sonnet-20240229), from a primary source (platform.claude.com) (status valid, confidence 0.95).


## Get this data

- JSON: /v1/entities/claude-3-sonnet/retired (this fact) · /v1/entities/claude-3-sonnet?predicates=retired (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: timeline(entity: "claude-3-sonnet", predicates: ["retired"]) for every dated value · fetch(id: "/record/claude-3-sonnet/retired.md") for this page
- Entity twin: /record/claude-3-sonnet.md · timeline: /timelines/claude-3-sonnet.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.