AI model · OpenAI
GPT-5.6 Luna Pro
Model ID: openai/gpt-5.6-luna-pro
- Input
- $0.20 per 1M tokens
- Output
- $1.20 per 1M tokens
- Context
- 1.1M tokens at once
- Max output
- 128K tokens per reply
- Released
- 9 Jul 2026 OpenAI
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes file, image, text; gives text.
How its listing describes it
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. **Cost note:** pro mode spends far more...
Sources
- OpenAI: GPT-5.6 Luna Pro on OpenRouter — read 2 Oct 2026