# OpenAI GPT-4.5 preview — deprecation status

> Yes — GPT-4.5 preview is retired. OpenAI deprecated it on April 14, 2025 and shut it down on July 14, 2025; API requests to it now fail. The recommended replacement is GPT-4.1.

The largest non-reasoning model OpenAI ever shipped, released in February 2025 and withdrawn from the API three months later — the shortest-lived flagship in the platform's history. It was expensive to serve and was overtaken by reasoning models that got more from less compute.

## Facts

| Field | Value |
| --- | --- |
| Provider | OpenAI |
| Model id | `gpt-4.5-preview` |
| Status | Retired |
| Released | February 27, 2025 |
| Deprecated | April 14, 2025 |
| Shutdown | July 14, 2025 (381 days ago) |
| Last verified | July 30, 2026 |

## Replacement

- **GPT-4.1** (`gpt-4.1`) · recommended — https://modeldeprecations.dev/openai/gpt-4.1
  - gpt-4.1 was the named successor and is still active — one of the few migration targets from this era that has not itself been deprecated.
  - Parameters it accepts: https://modelparams.dev/models/openai/gpt-4.1

```diff
- "model": "gpt-4.5-preview"
+ "model": "gpt-4.1"
```

## FAQ

### When did OpenAI GPT-4.5 preview shut down?

OpenAI GPT-4.5 preview shut down on July 14, 2025. API requests to it fail from that date onward.

### What replaces OpenAI GPT-4.5 preview?

OpenAI recommends GPT-4.1 (`gpt-4.1`) as the replacement for OpenAI GPT-4.5 preview. gpt-4.1 was the named successor and is still active — one of the few migration targets from this era that has not itself been deprecated.

### Is OpenAI GPT-4.5 preview still available?

No. OpenAI GPT-4.5 preview is retired and no longer served — it was shut down on July 14, 2025. Calls to it return an error.

### How do I migrate from OpenAI GPT-4.5 preview to gpt-4.1?

Swap the model id in your API call: replace "gpt-4.5-preview" with "gpt-4.1". gpt-4.1 was the named successor and is still active — one of the few migration targets from this era that has not itself been deprecated.

## Sources

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

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Canonical page: https://modeldeprecations.dev/openai/gpt-4.5-preview
JSON: https://modeldeprecations.dev/api/v1/models/openai/gpt-4.5-preview.json