# When is claude-3-sonnet-20240229 retired?

claude-3-sonnet-20240229 on Anthropic was retired on Jul 21, 2025.

Anthropic recommends migrating to claude-sonnet-5-5.

- Provider: Anthropic
- Model ID: claude-3-sonnet-20240229
- Status: retired
- Deprecation announced: unknown
- Shutdown date: 2025-07-21
- Replacement: claude-sonnet-5-5
- Replacement status: active
- Replacement kind: different_family
- End of replacement chain: claude-sonnet-5-5 (active, anthropic)
- Official source: https://platform.claude.com/docs/en/about-claude/model-deprecations
- Last checked: 2026-11-06T14:15:07+00:00
- Check status: verified
- Provider coverage today: https://aideprecations.com/api/v1/coverage.json
- Page: https://aideprecations.com/anthropic/claude-3-sonnet-20240229/

Cite as: AI Deprecations, "claude-3-sonnet-20240229 deprecation date", https://aideprecations.com/anthropic/claude-3-sonnet-20240229/ (source: https://platform.claude.com/docs/en/about-claude/model-deprecations). Data CC BY 4.0. Always confirm on the official source.