claude-3-sonnet-20240229 — Retired — shutdown July 21, 2025
For claude-3-sonnet-20240229, provider is Anthropic; lifecycle status is Retired; deprecation announced is January 21, 2025; shutdown / retirement date is July 21, 2025; recommended replacement is claude-sonnet-5-5; platform / deployment scope is Anthropic API / Claude Platform on AWS / Microsoft Foundry, recorded from its source on 2026-08-28; source re-checked 2026-11-11.
- Provider
- Anthropic our reading
- Model ID / API name
- claude-3-sonnet-20240229 verified
- Lifecycle status
- Retired
- Deprecation announced
- January 21, 2025 verified
- Shutdown / retirement date
- July 21, 2025 verified
- Recommended replacement
- claude-sonnet-5-5 verified
- Platform / deployment scope
- Anthropic API / Claude Platform on AWS / Microsoft Foundry our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
| July 21, 2025 | `claude-3-sonnet-20240229` | `claude-sonnet-5-5` |
— platform.claude.com, retrieved 2026-08-28
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Deprecation announced
On January 21, 2025, Anthropic notified developers using Claude 2, Claude 2.1, and Claude Sonnet 3 models of their upcoming retirements.
Platform / deployment scope
The dates on this page apply to Anthropic-operated platforms: the Claude API, Claude Platform on AWS, and Microsoft Foundry. Partner-operated platforms (Amazon Bedrock and Google Cloud) set their own retirement schedules, so a model's lifecycle status and dates can differ.
— all from platform.claude.com, retrieved 2026-08-28
Sources
- platform.claude.comhttps://platform.claude.com/docs/en/about-claude/model-deprecations.md
- platform.claude.comhttps://platform.claude.com/docs/en/about-claude/model-deprecations