Sunsetsby Glyphclaude-sonnet-4-5 (1) retirement date and replacement
Microsoft Foundry · Model · retires Nov 30, 2026 (in 21 days)Unverified
Dates
Checked Nov 9, 2026 on Microsoft's page| Retires | Nov 30, 2026 (in 21 days) |
|---|---|
| Replacement | claude-sonnet-5-5 |
| Model maker | Anthropic |
| What it is | claude-sonnet-4-5 (1) stops answering on Microsoft Foundry; use claude-sonnet-5-5 instead. |
| Source | learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule |
Changes
Retirement dateUnverified
Microsoft moved claude-sonnet-4-5 (1) from Oct 19, 2026 to Nov 30, 2026.
Oct 2Source
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