GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic...
OpenAI: GPT-6 Luna — OpenAI. Context window 1,050,000 tokens. API pricing (per 1M tokens): Input $0.1, Output $0.5. License: Proprietary. LMArena 1,391. GPQA Diamond 90.5%.
| Provider | OpenAI |
|---|---|
| API model ID | openai/gpt-6-luna |
| Tier | Frontier |
| Context window | 1,050,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $0.1 |
| API pricing (per 1M tokens) · Output | $0.5 |
| LMArena | 1,391 (gpt-6-luna-max) |
| GPQA Diamond | 90.5% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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