GPT-6 Luna Pro uses the same underlying model as GPT-6 Luna with Pro reasoning mode enabled for higher-quality responses on complex tasks.
Added Sep 22, 2026
Context Window
1.1M
Max Output
128.0K
Input Price (Auto)
$0.050/1M
Output Price (Auto)
$0.25/1M
Cache Read (Auto)
$0.0050/1M
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Compare GPT 6 Luna Pro with similar models from the same provider or model family.
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GPT 6 Astra Pro
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openai/gpt-5.6-lunaGPT-5.6 Luna is the fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume chat, classification, lightweight agentic workflows, and latency-sensitive reasoning tasks.