# OpenAI: GPT-5.6 Luna Pro: AI model fact sheet

- **Provider:** openai
- **Released:** 2026-07-09
- **Context window:** 1,050,000 tokens
- **API pricing:** $1.00 / 1M input, $6.00 / 1M output
- **OpenRouter ID:** openai/gpt-5.6-luna-pro
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use

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.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-5.6-luna-pro