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GPT-5.6 Terra Pro

by OpenAI

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 response

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Models

GPT-5.6 Terra Pro

Added 10 July 2026

#openai

Overview

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

How to use / API access

Call via OpenRouter with model id `openai/gpt-5.6-terra-pro`.

  • openrouter · openai/gpt-5.6-terra-pro Docs

OpenRouter id: openai/gpt-5.6-terra-pro

Notes

GPT-5.6 Terra Pro is listed in the EDNA Models directory from the OpenRouter catalogue.