# gpt-5.5-cyber-preview

Calls to the model gpt-5.5-cyber-preview on OpenAI stop working on February 1, 2027.

OpenAI will retire model gpt-5.5-cyber-preview on February 1, 2027. Calls targeting this model will fail after that date. Any application using model gpt-5.5-cyber-preview must update its requests before the shutdown.

## The error OpenAI returns once gpt-5.5-cyber-preview is gone

HTTP 404

```json
{"error":{"message":"The model `gpt-5.5-cyber-preview` has been deprecated, learn more here: https://platform.openai.com/docs/deprecations","type":"invalid_request_error","param":null,"code":"model_not_found"}}
```

## What to use instead

OpenAI recommends switching to the most capable cyber model available to you.

- API: OpenAI (api.openai.com)
- Model: gpt-5.5-cyber-preview
- Kind: Model retirement
- Takes effect: February 1, 2027
- Calls after that day: fail
- Calls it hits: `model gpt-5.5-cyber-preview`
- Source: [Deprecations page](https://developers.openai.com/api/docs/deprecations)
- Verified: November 6, 2026, against OpenAI's own pages
- Page: https://www.okapi.bot/models/openai/gpt-5.5-cyber-preview/

## OpenAI's words

> Shutdown date: February 1, 2027; Model / system: gpt-5.5-cyber-preview; Recommended replacement: The most capable cyber model available to you.

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent