OPOpenAI/ GPT
GPT-5.6 Terra Pro
openai/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
Model information
Released
2026-07-09
Context window
1.1M
Max output
128K
Weights
Closed
Modalities
Input
DocumentImageText
Output
Text
Identity
- Version
- gpt-5.6-terra-pro
- Knowledge cutoff
- 2026-02-16
Capabilities
ReasoningStructuredTool call
Providers
| Provider | Provider model ID | Protocol | Context | Max output | Input | Output | Capabilities | Notes | Pricing | Streaming |
|---|---|---|---|---|---|---|---|---|---|---|
| OpenRouter | openai/gpt-5.6-terra-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | Moderated, Reasoning levels: max, xhigh, high, medium, low, none, Default reasoning: medium | input $1/M · output $6/M cache read $0.1/M · cache write $1.25/M | Yes | ||
| NanoGPT | openai/gpt-5.6-terra-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $1/M · output $6/M cache read $0.1/M · cache write $1.25/M | Yes | ||
| Kilo Gateway | openai/gpt-5.6-terra-pro | openai_chat | 1.1M | 128K | AttachmentsReasoningTool callStructured | - | input $2/M · output $12/M cache read $0.2/M · cache write $2.5/M | Yes | ||
| OpenAI | gpt-5.6-terra-pro | custom | 1.1M | 128K | - | - | - | Yes |