# Claude Sonnet 4 retirement

entity: /record/claude-sonnet-4.md  
predicate: retired  
page: /record/claude-sonnet-4/retired  
as_of: 2026-11-04  

As of November 4, 2026, the AsOf record says Claude Sonnet 4 was retired on June 15, 2026 (as claude-sonnet-4-20250514), from a primary source (platform.claude.com). The record holds 1 claim on Claude Sonnet 4's retirement, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.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 Sonnet 4](/record/claude-sonnet-4.md) | retired | claude-sonnet-4-20250514 | valid 2026-06-15 to present | conf 0.95 | valid | [clm_A77C1EA3626C](/claim/clm_A77C1EA3626C.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 Superseded claims stay visible.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 Sonnet 4](/record/claude-sonnet-4.md) | retired | claude-sonnet-4-20250514 | valid 2026-06-15 to present | conf 0.95 | valid | [clm_A77C1EA3626C](/claim/clm_A77C1EA3626C.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations

## Questions this record answers

### When was Claude Sonnet 4 retired?

On June 15, 2026 (as claude-sonnet-4-20250514), from a primary source (platform.claude.com) (status valid, confidence 0.95).


## Get this data

- JSON: /v1/entities/claude-sonnet-4/retired (this fact) · /v1/entities/claude-sonnet-4?predicates=retired (with the entity's coverage; add as_of=YYYY-MM-DD for a date)
- MCP: timeline(entity: "claude-sonnet-4", predicates: ["retired"]) for every dated value · fetch(id: "/record/claude-sonnet-4/retired.md") for this page
- Entity twin: /record/claude-sonnet-4.md · timeline: /timelines/claude-sonnet-4.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.