OpenAI
GPT-5.6 Terra Pro
openai/gpt-5.6-terra-pro
Input
$2.00
per 1M tokens
Output
$12.00
per 1M tokens
Cached input
$0.20
per 1M tokens
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. **Cost note:** pro mode spends far more...
- Released
- Context window
- 1M tokens
- Max output
- 128K tokens
- Input
- file, image, text
- Output
- text
- Reasoning
- Yes
Price history
No price changes since we started tracking on .
Providers on OpenRouter
5 endpoints serve this model. Uptime is OpenRouter's share of successful requests; prices per 1M tokens.
| Provider | Input | Output | Context window | Uptime 30 min | Uptime 24 h |
|---|---|---|---|---|---|
| OpenAIflexvendor's owndiscount/priority tier | $1.00 | $6.00 | 1M | — | — |
| Azure | $2.00 | $12.00 | 1M | — | 100% |
| OpenAIvendor's own | $2.00 | $12.00 | 1M | 100% | 100% |
| Azureeu | $2.20 | $13.20 | 1M | — | — |
| OpenAIfastvendor's own | $4.00 | $24.00 | 1M | — | — |