# Migrating off gpt-5.3-codex

**Azure OpenAI** retires **gpt-5.3-codex** on **2027-08-24** (in 289 days).
No replacement named by the provider.

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 |
|---|---|---|---|
| gpt-5.3-codex | Azure OpenAI | 2027-08-24 | — not named |

Also retiring on 2027-08-24:
- gpt-audio-1.5 (Azure OpenAI) → no replacement named
- gpt-realtime-1.5 (Azure OpenAI) → no replacement named

Source: https://llmlatency.dev/migrate/azure-openai-gpt-5-3-codex