GPT-5.6 Luna Pro is the same underlying model as 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...
OpenAI: GPT-5.6 Luna Pro — OpenAI. Context window 1,050,000 tokens. API pricing (per 1M tokens): Input $0.2, Output $1.2. License: Proprietary.
| Provider | OpenAI |
|---|---|
| API model ID | openai/gpt-5.6-luna-pro |
| Tier | Frontier |
| Context window | 1,050,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $0.2 |
| API pricing (per 1M tokens) · Output | $1.2 |