About GPT-5.6 Terra Pro
GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.
Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Specifications
- Provider
- OpenAI
- Context Length
- 1,050,000 tokens
- Input Types
- file, image, text
- Output Types
- text
- Category
- openai/gpt-5.6-terra-pro-20260709
- Added
- 7/9/2026