GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for its price tier.
Modalities
In / Out Price
$1 / $6per 1M
Context
1M
Released
Jul 9, 2026
Knowledge Cutoff
Feb 2026