# OpenAI GPT-4 Turbo preview — deprecation status

> Yes — GPT-4 Turbo preview is retired. OpenAI deprecated it on September 26, 2025 and shut it down on March 26, 2026; API requests to it now fail. The recommended replacement is GPT-5.6 Sol.

A floating pointer that resolved to whichever GPT-4 Turbo preview snapshot was current, which meant its behaviour changed underneath anyone who used it. It was retired in March 2026 along with the snapshots it pointed at.

## Facts

| Field | Value |
| --- | --- |
| Provider | OpenAI |
| Model id | `gpt-4-turbo-preview` |
| Status | Retired |
| Aliases | `gpt-4-turbo-preview-completions` |
| Deprecated | September 26, 2025 |
| Shutdown | March 26, 2026 (126 days ago) |
| Last verified | July 30, 2026 |

## Replacement

- **GPT-5.6 Sol** (`gpt-5.6-sol`) · recommended — https://modeldeprecations.dev/openai/gpt-5.6-sol
  - Prefer a pinned id this time. Floating preview pointers have been retired in every OpenAI deprecation wave since 2024.
  - Parameters it accepts: https://modelparams.dev/models/openai/gpt-5.6-sol

```diff
- "model": "gpt-4-turbo-preview"
+ "model": "gpt-5.6-sol"
```

## FAQ

### When did OpenAI GPT-4 Turbo preview shut down?

OpenAI GPT-4 Turbo preview shut down on March 26, 2026. API requests to it fail from that date onward.

### What replaces OpenAI GPT-4 Turbo preview?

OpenAI recommends GPT-5.6 Sol (`gpt-5.6-sol`) as the replacement for OpenAI GPT-4 Turbo preview. Prefer a pinned id this time. Floating preview pointers have been retired in every OpenAI deprecation wave since 2024.

### Is OpenAI GPT-4 Turbo preview still available?

No. OpenAI GPT-4 Turbo preview is retired and no longer served — it was shut down on March 26, 2026. Calls to it return an error.

### How do I migrate from OpenAI GPT-4 Turbo preview to gpt-5.6-sol?

Swap the model id in your API call: replace "gpt-4-turbo-preview" with "gpt-5.6-sol". Prefer a pinned id this time. Floating preview pointers have been retired in every OpenAI deprecation wave since 2024.

### Does this apply to gpt-4-turbo-preview-completions too?

Yes. OpenAI GPT-4 Turbo preview is also published as `gpt-4-turbo-preview-completions`; that id shares the same lifecycle dates as `gpt-4-turbo-preview`.

## Sources

- [OpenAI API deprecations](https://developers.openai.com/api/docs/deprecations) — accessed 2026-07-30

---

Canonical page: https://modeldeprecations.dev/openai/gpt-4-turbo-preview
JSON: https://modeldeprecations.dev/api/v1/models/openai/gpt-4-turbo-preview.json