# Migrating off o3

**OpenAI** retires **o3** on **2026-12-11** (in 46 days).
Documented replacement: **gpt-5.6-sol**.

Source: https://developers.openai.com/api/docs/deprecations
Source last checked: 2026-10-26.
Calendar as of 2026-10-26 UTC.

| Model | Provider | Retires | Replacement |
|---|---|---|---|
| o3 | OpenAI | 2026-12-11 | gpt-5.6-sol |

Also retiring on 2026-12-11:
- gpt-5 (OpenAI) → gpt-5.6-sol
- gpt-5-mini (OpenAI) → gpt-5.6-terra
- gpt-5-nano (OpenAI) → gpt-5.6-luna
- gpt-5-pro (OpenAI) → gpt-5.6-sol (reasoning.mode: pro)
- o3-pro (OpenAI) → gpt-5.6-sol (reasoning.mode: pro)
- gpt-5-2025-08-07 (OpenAI) → gpt-5.6-sol
- gpt-5-mini-2025-08-07 (OpenAI) → gpt-5.6-terra
- gpt-5-nano-2025-08-07 (OpenAI) → gpt-5.6-luna
- gpt-5-pro-2025-10-06 (OpenAI) → gpt-5.6-sol (reasoning.mode: pro)
- o3-2025-04-16 (OpenAI) → gpt-5.6-sol

Source: https://llmlatency.dev/migrate/openai-o3