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OpenAI: GPT-5.6 Luna Pro

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openai/gpt-5.6-luna-pro

GPT-5.6 Luna Pro is OpenAI’s AI model, released Jul 9, 2026. It costs $0.20/M input and $1.20/M output tokens, and handles a 1.1M-token context window.

GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), 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
$0.20 / 1M
Output
$1.20 / 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 Luna 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

13
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $0.2 per 1M input tokens (was $1, -80%)cheapest provider · Aug 12, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $1.2 per 1M output tokens (was $6, -80%)cheapest provider · Aug 12, 2026
  • GPT-5.6 Luna Pro: vendor list price cut from $6 to $1.2 per 1M output tokens (-80%)list price · Aug 1, 2026
  • GPT-5.6 Luna Pro: vendor list price cut from $1 to $0.2 per 1M input tokens (-80%)list price · Aug 1, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via OpenAI now $6 per 1M output tokens (was $6.6, -9%)cheapest provider · Jul 23, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via OpenAI now $1 per 1M input tokens (was $1.1, -9%)cheapest provider · Jul 23, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $6.6 per 1M output tokens (was $6, +10%)cheapest provider · Jul 21, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $1.1 per 1M input tokens (was $1, +10%)cheapest provider · Jul 21, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $6 per 1M output tokens (was $6.6, -9%)cheapest provider · Jul 15, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $1 per 1M input tokens (was $1.1, -9%)cheapest provider · Jul 15, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $6.6 per 1M output tokens (was $6, +10%)cheapest provider · Jul 12, 2026
  • GPT-5.6 Luna Pro: cheapest credible provider via Azure now $1.1 per 1M input tokens (was $1, +10%)cheapest provider · Jul 12, 2026
  • GPT-5.6 Luna Pro (OpenAI) added to the tracker.tracked · Jul 9, 2026

Compare GPT-5.6 Luna Pro with

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

Frequently asked questions

What is GPT-5.6 Luna Pro?

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

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

How much does GPT-5.6 Luna Pro cost?

GPT-5.6 Luna Pro's list price from OpenAI is $0.20 per million input tokens and $1.20 per million output tokens.

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

GPT-5.6 Luna 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.