# Migrating off o1

**Azure OpenAI** retires **o1** on **2026-11-19** (in 11 days).
Documented replacement: **gpt-5.6-sol**.

Source: https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule
Source last checked: 2026-11-07.
Calendar as of 2026-11-08 UTC.

| Model | Provider | Retires | Replacement |
|---|---|---|---|
| o1 | Azure OpenAI | 2026-11-19 | gpt-5.6-sol |

Also retiring on 2026-11-19:
- o1-pro (Azure OpenAI) → gpt-5.6-sol
- o3 (Azure OpenAI) → gpt-5.6-sol
- o3-deep-research (Azure OpenAI) → gpt-5.6-sol
- o3-mini (Azure OpenAI) → gpt-5.6-terra
- o3-pro (Azure OpenAI) → gpt-5.6-sol
- o4-mini (Azure OpenAI) → gpt-5.6-terra

Source: https://llmlatency.dev/migrate/azure-openai-o1