GPT-5.6 Luna
OpenAI · Cost-efficient GPT-5.6 model for fast, high-volume workloads
Key facts
- Provider
- OpenAI
- Context window
- 1.1M tokens
- Max output
- 128K tokens
- Input price
- $0.2 / M tok
- Output price
- $1.2 / M tok
- Knowledge cutoff
- Feb 16, 2026
- Released
- Jul 9, 2026
- License
- —
Capabilities
ReasoningTool callingStructured outputFile attachmentsTemperature controlOpen weights
Reasoning options
- effort none · low · medium · high · xhigh · max
Pricing
USD per million tokens, list API rates.
- Input
- $0.2
- Output
- $1.2
- Cache read
- $0.02
- Cache write
- $0.25
Modalities
- Input
- Text, Image, Pdf
- Output
- Text