GPT-5.6 Luna
OpenAI馃嚭馃嚫
openai/gpt-5.6-lunaGPT-5.6 Luna is the fast, low-cost tier of OpenAI's GPT-5.6 family, tuned for high-volume, latency-sensitive work like chat, classification, and lightweight agents while retaining genuine GPT-5.6 reasoning.
Cost rate
0.2x
Context
1.1M
Released
Jul 9, 2026
Input
FileImageText
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
Document analysis
#23 路 top 52%
Mathematical
#40 路 top 11%
Image understanding
#40 路 top 26%
Business, Management, & Finance
#48 路 top 12%
Performance
Median latency and throughput measured across recent requests.
Throughput114 tok/s
Latency