OpenAI · model

`o1-preview` deprecation: shutdown date & replacement

Shut down July 28, 2025

How to migrate off o1-preview

Find every place that references it:

grep -rn --exclude-dir={node_modules,.git,dist} "o1-preview" .

Replace the model ID:
```
- model: "o1-preview"
+ model: "o3"
```
Re-run your evals or a sample of real prompts — output style, token usage and pricing can change between models.
Check config outside code too: environment variables, feature flags, prompt-management tools, and fine-tuned model references.
Deploy before July 28, 2025, and add the CI scanner so it cannot come back.

Is o1-preview deprecated?

Yes. OpenAI has deprecated o1-preview. It was shut down on July 28, 2025.

When does o1-preview shut down?

July 28, 2025, according to OpenAI's official deprecation notice.

What should I use instead of o1-preview?

OpenAI recommends o3. Switch the model ID and re-test your prompts, since outputs, pricing and limits can differ.

What happens to requests to o1-preview after the shutdown?

Requests using the retired model ID fail with an error, so any code still calling it breaks. Update and deploy before the shutdown date.