claude-sonnet-4-5-20250929 retirement date and replacement
Claude API · Model · retires Nov 30, 2026 (in 56 days)Unverified
Dates
Checked Oct 5, 2026 on Anthropic's page| Retires | Nov 30, 2026 (in 56 days) |
|---|---|
| Announced | Sep 30, 2026 |
| Replacement | claude-sonnet-5-5 |
| Model page | models.fru.dev/models/claude-sonnet-4-5 |
| Notice | Claude Sonnet 4.5 model |
| Source | platform.claude.com/docs/en/about-claude/model-deprecations |
Changes
Around the same time on Claude API
Anthropic- claude-opus-4-5-20251101Claude APIModel50d or laterNov 24