openai/gpt-5.6-terra-proGPT-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
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.6 Terra Pro lands among all models tracked on Model Beat.
No standardized benchmark scores from Epoch AI yet — common for very recent, image, or niche models. Scores appear here once published.
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
GPT-5.6 Terra Pro is an AI model developed by OpenAI, part of the GPT family, released Jul 9, 2026.
GPT-5.6 Terra Pro's list price from OpenAI is $2.50 per million input tokens and $15 per million output tokens.
GPT-5.6 Terra Pro supports a context window of up to 1.1M tokens.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 9, 2026.