GPT-6 Luna
OpenAI's small, fast and cheap GPT-6 model, for quick answers and high volume.
OpenAI, chat. Checked 30 October 2026.
Where to use it through an API
- OpenAI
gpt-6-luna
The maker publishes its own benchmarks and limits on its model page.
How it compares
The models just above and below it on the Artificial Analysis Intelligence Index.
| Model | Index | Context | Speed |
|---|---|---|---|
| Gemini 3.8 Flash | 31 | 1M | 129/s |
| MiniMax M3.1 Flash | 29 | 1M | 118/s |
| GLM-5.3 Flash | 28 | 1M | 71/s |
| GPT-6 Luna | 28 | 1M | 118/s |
| Mistral Large 4 | 26 | 1M | 161/s |
| Muse Spark Open | 25 | 1.05M | 140/s |
| DeepSeek V4 Pro | 23 | 1M | 74/s |
Use GPT-6 Luna with every other AI at once
Put GPT-6 Luna in one panel and ChatGPT, Claude, Gemini or any of 300+ models in the others. One message goes to all of them, answers arrive side by side, and test mode times them and hides the names so you judge fairly. Pro is free with a follow on X, and you use your own keys.
Questions
Is there a free GPT-6 Luna API?
Not that we found. GPT-6 Luna is paid per token through OpenAI.
What is the GPT-6 Luna model id?
OpenAI: gpt-6-luna.
How does GPT-6 Luna score?
28 on the Artificial Analysis Intelligence Index at its max setting, checked 30 October 2026.
Can I use GPT-6 Luna with ChatGPT, Claude and Gemini at the same time?
Yes. MultiScreenAI puts GPT-6 Luna in one panel and other models in the others, sends one message to all of them and shows the answers side by side.