GPT-6 Luna
OpenAI馃嚭馃嚫
openai/gpt-6-lunaGPT-6 Luna is the fast, low-cost tier of OpenAI's GPT-6 series (1.05M-token context, text, image, and file input, $0.10/$0.50 per million input/output tokens), released September 22, 2026 below GPT-6 Sol and the flagship GPT-6 Astra. It is built for high-volume tasks with a clear goal, such as summarization, extraction, classification, quick questions, and lightweight agentic steps.
Cost rate
0.1x
Context
1.1M
Released
Sep 22, 2026
Input
FileImageText
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
Image understanding
#65 路 top 39%
Mathematical
#67 路 top 17%
Software & IT Services
#79 路 top 19%
Writing, Literature, & Language
#86 路 top 21%