GPT-5.6 Luna (batch)

GPT-5.6 Luna is OpenAI's lightweight model in the GPT-5.6 series, optimized for speed and efficiency with a 1.05M token context window.

Strengths

The model delivers fast inference and capable reasoning across a wide range of tasks while maintaining efficiency.

Best for

High-volume, latency-sensitive workloads such as chat, classification, and lightweight agentic workflows.

Limitations

As the smallest model in the GPT-5.6 series, Luna is not designed for complex reasoning or multi-step problem-solving tasks that require the capabilities of GPT-5.6 Sol or GPT-5.6 Terra.