GPT-6 Luna
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol.
Specifications
| Lab | OpenAI |
|---|---|
| Context window | 1.1M tokens |
| Input price | $0.10/1M |
| Output price | $0.50/1M |
| Release | Sep 2026 |
Strengths
- 1.05M-token context window
- Low-cost high-volume serving
- Text, image, and file input
Weaknesses
- Below Sol on demanding reasoning tasks
- Limited independent evaluation data
Best for
- High-volume assistants
- Multimodal classification
- Lightweight agents
In Depth: GPT-6 Luna
Summary
GPT-6 Luna is an AI model from OpenAI.
Released in Sep 2026. It takes file, image, and text input and produces text output, with a context window of 1.1M tokens. Input pricing is $0.10 per 1M tokens and output is $0.50 per 1M tokens on OpenRouter.