OpenAIPremium plan
GPT-5.6 Luna
GPT-5.6's cost-sensitive model for fast, high-volume chat, extraction, ranking, and lightweight tool use.
You always get the exact model you pick — we never silently route you to another.
Specifications
| Provider | OpenAI |
|---|---|
| Released | 2026-07-09 |
| Intelligence | Medium |
| Speed | Fast |
| Context window | 1,050,000 tokens |
| Max output | 128,000 tokens |
| Knowledge cutoff | February 16, 2026 |
| Input price | $1.00 / 1M tokens |
| Output price | $6.00 / 1M tokens |
| Request cost | 1 premium request |
| Plan tier | Premium |
| Input | Text, Image |
| Output | Text |
| Features | Structured outputs, web search, file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP, and tool search supported |
| API endpoints | v1/chat/completions, v1/responses, v1/batch |
| Model ID | gpt-5.6-luna |