GPT-6 Luna

GPT-6 Luna

OpenAI馃嚭馃嚫openai/gpt-6-luna

GPT-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.

Released
Sep 22, 2026
Input
FileImageText
Output
Text
Support
ReasoningTool callingStructured outputs

Best at

The categories where this model ranks highest.

Image understanding

#68 路 top 41%

Mathematical

#69 路 top 17%

Software & IT Services

#78 路 top 19%

Writing, Literature, & Language

#92 路 top 22%

Performance

Median latency and throughput measured across recent requests.

Throughput114 tok/s
Latency10.01s