claude-3-sonnet-20240229 retirement date and replacement
Claude API · Model · retired Jul 21, 2025 (retired)
Dates
Checked Sep 25, 2026 on Anthropic's page| Retired | Jul 21, 2025 (retired) |
|---|---|
| Announced | Jan 21, 2025 |
| Replacement | claude-sonnet-4-6 |
| Notice | Claude 2, Claude 2.1, and Claude Sonnet 3 models |
| Source | platform.claude.com/docs/en/about-claude/model-deprecations |
Around the same time on Claude API
Anthropic- claude-2.0Claude APIModelclaude-opus-4-814mo agoJul 21, 2025
- claude-2.1Claude APIModelclaude-opus-4-814mo agoJul 21, 2025