GPT-5.6 Luna
GPT-5.6 Luna is OpenAI's cost-optimized GPT-5.6 model for high-volume workloads, with a 1.05-million-token context window and up to 128K output tokens.
Overview
The model accepts text and image input and returns text. It supports reasoning controls, function calling, structured output, code execution, computer use, and other OpenAI tool surfaces.
Model specifications
- Family
- GPT-5.6
- Context
- 1,050,000 tokens
- Input
- Text, Image
- Output
- Text
- Open weights
- No
- Capabilities
- Reasoning, Vision, Tool Use, Function Calling, Structured Output, Code Execution, Computer Use
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