OpenAI
GPT-5.6 Luna (xhigh)
Quality Score55.6
Value Score51.3
Reliability44.6
Cache Discount90%
Model specification
- Reasoning
- reasoning
- Input modalities
- text, image
- Output modalities
- text
- Context window
- 1M tokens
- Weights
- closed weights
Token prices USD per 1M tokens
- Input
- $0.200
- Output
- $1.20
- Cached Input
- $0.020
- Cached Output
- $0.250
- Cost per task
- $0.032
Capability
- Intelligence
- 50.1
- Coding
- 68.6
- Agentic
- 44.4
- Omniscience
- -10.8
- Correct
- 42.4%
- Blended price
- $0.174
Answer outcomes
Correct 42.4%Incorrect 53.2%Abstained 4.3%
Artificial Analysis benchmarks
- GDPval-AA v2
- 51%
- τ³-Banking
- 29%
- Terminal-Bench v2.1
- 78%
- SciCode
- 50%
- Humanity’s Last Exam
- 37%
- GPQA Diamond
- 89%
- CritPt
- 21%
- AA-Omniscience
- 45%
- AA-LCR
- 73%
Similar models
- GPT-5.6 Terra (medium)OpenAIQuality Score 55.6Value Score 37.9
- GPT-5.6 Terra (high)OpenAIQuality Score 58.6Value Score 40.1
- GPT-5.6 Luna (max)OpenAIQuality Score 57.3Value Score 53.2
- GPT-5.6 Luna (high)OpenAIQuality Score 52.8Value Score 48.6
- GPT-5.3 Codex (xhigh)OpenAIQuality Score 58.6Value Score 39.0
- GPT-5.6 Terra (xhigh)OpenAIQuality Score 60.6Value Score 41.8