GPT-5.6 Luna
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
The figures
- Made by
- OpenAI
- Model ID
- openai/gpt-5.6-luna
- Input
- $0.2 per million tokens
- Output
- $1.2 per million tokens
- Context window
- 1.05M tokens
- Longest answer
- 128K tokens
- Takes in
- file, image, text
- Gives back
- text
- Reasoning
- Yes
- Tool calling
- Yes
- Reads images
- Yes
- Open weights
- No
- Released
- 9 Jul 2026
Read on 3 Oct 2026.