Model comparison
GPT-5.6 Luna vs GPT-5
Capability radar, value bars, and side-by-side posture.
GPT-5.6 Luna
Not scored
value score
GPT-5
94
value score
GPT-5.6 Luna ctx
—
GPT-5 ctx
400K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- GPT-594
Attribute tape
| Field | GPT-5.6 Luna | GPT-5 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context | — | 400K |
| Modalities | Text, Code, Image, Audio | |
| Openness | — | Proprietary Model |
| Speed | — | Fast |
| Price | — | Mid-High |
| Value score | — | 94 |
| Summary | GPT-5.6 Luna is OpenAI's smallest, fastest, and most cost-efficient model in the GPT-5.6 family, designed for high-volume, cost-sensitive workloads such as classification, extraction, chat, and lightweight agent workflows. It offers a 1,050,000-token context window and 128,000 max output tokens, positioned as the throughput-optimized tier below Terra (balanced) and Sol (flagship). | OpenAI frontier multimodal model. |