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OpenAI: GPT-5.6 Sol Pro

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openai/gpt-5.6-sol-pro

GPT-5.6 Sol Pro is OpenAI’s AI model, released Jul 9, 2026. It costs $4/M input and $20/M output tokens, and handles a 1.1M-token context window.

GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), 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
$4 / 1M
Output
$20 / 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 Sol 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.

In the news

1

Changelog

9
  • GPT-5.6 Sol Pro: vendor list price cut from $5 to $4 per 1M input tokens (-20%)list price · Aug 23, 2026
  • GPT-5.6 Sol Pro: vendor list price cut from $30 to $20 per 1M output tokens (-33%)list price · Aug 23, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $30 per 1M output tokens (was $33, -9%)cheapest provider · Jul 23, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $5 per 1M input tokens (was $5.5, -9%)cheapest provider · Jul 23, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $33 per 1M output tokens (was $30, +10%)cheapest provider · Jul 13, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $5.5 per 1M input tokens (was $5, +10%)cheapest provider · Jul 13, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $30 per 1M output tokens (was $33, -9%)cheapest provider · Jul 11, 2026
  • GPT-5.6 Sol Pro: cheapest credible provider via Azure now $5 per 1M input tokens (was $5.5, -9%)cheapest provider · Jul 11, 2026
  • GPT-5.6 Sol Pro (OpenAI) added to the tracker.tracked · Jul 9, 2026

Compare GPT-5.6 Sol Pro with

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

Frequently asked questions

What is GPT-5.6 Sol Pro?

GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), 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 Sol Pro?

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

How much does GPT-5.6 Sol Pro cost?

GPT-5.6 Sol Pro's list price from OpenAI is $4 per million input tokens and $20 per million output tokens.

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

GPT-5.6 Sol 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 23, 2026.