GPT-5.6 Terra Pro
by OpenAIopenai/gpt-5.6-terra-pro
LLMCompare cannot run GPT-5.6 Terra Pro yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowGPT-5.6 Terra Pro at a glance
- Context length
- 1,050,000 tokens
- Maximum output
- 128,000 tokens
- Accepts
- Text, Image, File
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
maxxhighhighmediumlownoneReasoning can be turned off.- Released
- 9 Jul 2026
- Knowledge cutoff
- 16 February 2026
Model facts synced from the OpenRouter model list on 21 Oct 2026.
GPT-5.6 Terra Pro pricing by route
A route is the service LLMCompare calls to reach the model. GPT-5.6 Terra Pro has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Cache writeper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $2.00 | $12.00 | $0.20 | $2.50 | openrouter.ai/openai/gpt-5.6-terra-pro |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to GPT-5.6 Terra Pro costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.008
- 10 credits
- Cost of 100 calls
- $0.80
- 1,000 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
max_tokens | Integer | 1 to 128,000 | Provider default |
reasoning_effort | One of | maxxhighhighmediumlownone | medium |
seed | Integer | -2,147,483,648 to 4,294,967,295 | Provider default |
response_format | One of | textjson_object | Provider default |
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. **Cost note:** pro mode spends far more...
Description as published for this model. LLMCompare has not edited it.
Models to compare with GPT-5.6 Terra Pro
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
GPT-5.6 TerraOpenAIopenai/gpt-5.6-terra | 1.05M | 128k | $2.00 | $12.00 | ReasoningJSONToolsCacheVision | Runnable now | ||
GPT AudioOpenAIopenai/gpt-audio | 128k | 16.4k | $2.50 | $10.00 | JSONTools | No route yet | ||
GPT-4o (2024-11-20)OpenAIopenai/gpt-4o-2024-11-20 | 128k | 16.4k | $2.50 | $10.00 | JSONToolsCacheVision | No route yet | ||
Gemini 3.1 Pro Preview Custom ToolsGooglegoogle/gemini-3.1-pro-preview-customtools | 1.05M | 65.5k | $2.00 | $12.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Gemini 3.1 Pro PreviewGooglegoogle/gemini-3.1-pro-preview | 1.05M | 65.5k | $2.00 | $12.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Nova Premier 1.0Amazonamazon/nova-premier-v1 | 1M | 32k | $2.50 | $12.50 | ToolsCacheVision | No route yet |
Questions about GPT-5.6 Terra Pro
- How much does GPT-5.6 Terra Pro cost?
- On the OpenRouter route, GPT-5.6 Terra Pro costs $2.00 per 1 million input tokens and $12.00 per 1 million output tokens, in US dollars. Input tokens that GPT-5.6 Terra Pro reads from the prompt cache cost $0.20 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of GPT-5.6 Terra Pro?
- GPT-5.6 Terra Pro has a context length of 1,050,000 tokens and returns up to 128,000 output tokens in one call.
- What inputs does GPT-5.6 Terra Pro accept?
- GPT-5.6 Terra Pro accepts these inputs: Text, Image, File. GPT-5.6 Terra Pro returns: Text.
- Which reasoning effort levels does GPT-5.6 Terra Pro support?
- GPT-5.6 Terra Pro supports these reasoning effort levels: max, xhigh, high, medium, low, none. Reasoning can be turned off for GPT-5.6 Terra Pro.
- Can I test GPT-5.6 Terra Pro on my own data?
- Not yet. LLMCompare lists the prices and parameters of GPT-5.6 Terra Pro, but no route to GPT-5.6 Terra Pro is configured on LLMCompare, so it cannot be selected for an evaluation.