openai
OpenAI: GPT-5.6 Luna Pro
openai/gpt-5.6-luna-pro
For $1, you can send approximately:
~20.4messages
How do we get this number?
One message = ~7,000 input tokens + ~7,000 output tokens
Input cost per message7,000 x $1.00/M = $0.007000
Output cost per message7,000 x $6.00/M = $0.042000
Total cost per message$0.049000
Messages for $120.41
Context window
1.1M
tokens
Max response
128k
tokens
Input price
$1.00
per million tokens
Output price
$6.00
per million tokens
Modalities
Input:fileInput:imageInput:textOutput:text
Description
GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode