# o3-deep-research

Calls to the model o3-deep-research on OpenAI stopped working on July 23, 2026.

- API: OpenAI (api.openai.com)
- Model: o3-deep-research
- Kind: Model retirement
- Takes effect: July 23, 2026
- Calls after that day: fail
- Calls it hits: `model o3-deep-research`
- Source: [Deprecations page](https://developers.openai.com/api/docs/deprecations)
- Page: https://www.okapi.bot/models/openai/o3-deep-research/

## What to use instead

Move to gpt-5.6-sol, recommended by OpenAI.