GPT-5.6 Terra Pro
OpenAIGPT-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
In
$2.00
Out
$12.00
Blended
$4.50
Where to buy this model
2 access routes| Route | In | Out | Blended | vs |
|---|---|---|---|---|
| $1.00 | $6.00 | $2.25 | - | |
| $2.00 | $12.00 | $4.50 | +100% |
● official API · ● cloud platform · ● inference host · USD per 1M tokens. Same model, different providers - price and quantization vary.
- Ctx
- 1.05M
- max output
- 128K
- cache read /1M
- $0.20
- Family
- gpt
- Modalities
- file · image · text
- Features
- json · reasoning · tools
Live pricing, updated 2026-09-15.