GPT-5.1-Codex-Max
Shutting down. GPT-5.1-Codex-Max shuts down on Azure AI Foundry on May 18, 2027. OpenAI names GPT-5.6 Sol as the replacement.
7 mo- Next shutdown
- 216 daysMay 18, 2027 · Azure AI Foundry
- Context window
- 400KMax output 128K tokens
- Released
- Dec 4, 2025OpenAI
Dates on every platform
2 listings · a floor is the earliest possible date
| Platform | Model ID and status | Deprecated | Shuts down | Replacement |
|---|---|---|---|---|
| OpenAI APIOpenAI: Deprecations (opens in a new tab) · checked Oct 14, 2026 | gpt-5.1-codex-maxShut down | Shut down | GPT-5.6 Sol | |
| Azure AI FoundryMicrosoft: Model retirement schedule - Microsoft Foundry (opens in a new tab) · checked Oct 14, 2026 | gpt-5.1-codex-max:2025-12-04Active | – | 7 mo | – |
What breaks when you move off GPT-5.1-Codex-Max
No breaking changes are recorded for the move to GPT-5.6 Sol. Run your own cases on it before the date.
List prices
$ per 1M tokens, with each price’s source
| Platform | Input | Cached | Output | In effect | Source |
|---|---|---|---|---|---|
Azure AI Foundrygpt-5.1-codex-max:2025-12-04 | $1.25 | $0.125 | $10.00 | Dec 4, 2025Current · Global Standard rate from the US East 2 price list. | Microsoft: Azure Retail Prices API (Foundry Models, US East 2) (opens in a new tab) |
Change history
ShutdownCodex, chat, search, deep research and computer-use snapshots shut down on the OpenAI APIOpenAI API
OpenAI shut down the GPT-5, GPT-5.1 and GPT-5.2 Codex models, the GPT-5 and GPT-5.1 chat snapshots, the GPT-4o search previews, computer-use-preview and the o3 and o4-mini deep research models. It names GPT-5.6 Sol or GPT-5.6 Terra as the substitute for each.
- Platform
- OpenAI API
- Models
- computer-use-preview, GPT-4o Search Preview, GPT-4o Mini Search Preview, GPT-5 Chat, GPT-5-Codex, GPT-5.1 Chat, GPT-5.1-Codex, GPT-5.1-Codex-Max, GPT-5.1-Codex Mini, GPT-5.2-Codex, o3-deep-research, o4-mini-deep-research
- Announced