# GPT-6 Luna Pro: AI model fact sheet

- **Provider:** openai
- **Released:** 2026-09-22
- **Context window:** 1,050,000 tokens
- **API pricing:** $0.10 / 1M input, $0.50 / 1M output
- **OpenRouter ID:** openai/gpt-6-luna-pro
- **Capabilities:** conversation, reasoning, analysis, code-generation, tool-use

GPT-6 Luna served with pro reasoning mode. It applies additional reasoning computation to the Luna model while retaining its text, image, and file inputs and 1.05-million-token context.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-6-luna-pro