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OpenAI: GPT-5.6 Terra Pro

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openai/gpt-5.6-terra-pro

GPT-5.6 Terra Pro is OpenAI’s AI model, released Jul 9, 2026. It costs $2/M input and $12/M output tokens, and handles a 1.1M-token context window.

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

Context
1.1M
Input
$2 / 1M
Output
$12 / 1M
Released
Jul 9, 2026
Modalities
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Benchmarks

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.

Changelog

5
  • GPT-5.6 Terra Pro: cheapest credible provider via Azure now $2 per 1M input tokens (was $2.5, -20%)cheapest provider · Aug 12, 2026
  • GPT-5.6 Terra Pro: cheapest credible provider via Azure now $12 per 1M output tokens (was $15, -20%)cheapest provider · Aug 12, 2026
  • GPT-5.6 Terra Pro: vendor list price cut from $2.5 to $2 per 1M input tokens (-20%)list price · Aug 1, 2026
  • GPT-5.6 Terra Pro: vendor list price cut from $15 to $12 per 1M output tokens (-20%)list price · Aug 1, 2026
  • GPT-5.6 Terra Pro (OpenAI) added to the tracker.tracked · Jul 9, 2026

Compare GPT-5.6 Terra Pro with

GPT-5.6 Terra Pro vs Claude Fable 5GPT-5.6 Terra Pro vs GPT-5.6 SolGPT-5.6 Terra Pro vs Kimi K3GPT-5.6 Terra Pro vs Grok 4.6GPT-5.6 Terra Pro vs Gemini 3.1 Pro

Frequently asked questions

What is 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

Who created GPT-5.6 Terra Pro?

GPT-5.6 Terra Pro is an AI model developed by OpenAI, part of the GPT family, released Jul 9, 2026.

How much does GPT-5.6 Terra Pro cost?

GPT-5.6 Terra Pro's list price from OpenAI is $2 per million input tokens and $12 per million output tokens.

What is GPT-5.6 Terra Pro's context window?

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 Aug 20, 2026.