OpenAI
GPT-5.6 Luna (medium)
Quality Score46.4
Value Score42.0
Reliability43.4
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
- $0.011
Capability
- Intelligence
- 38.9
- Coding
- 50.7
- Agentic
- 31.8
- Omniscience
- -13.2
- Correct
- 40.7%
- Blended price
- $0.174
Answer outcomes
Correct 40.7%Incorrect 53.9%Abstained 5.4%
Artificial Analysis benchmarks
- GDPval-AA v2
- 39%
- τ³-Banking
- 18%
- Terminal-Bench v2.1
- 53%
- SciCode
- 46%
- Humanity’s Last Exam
- 26%
- GPQA Diamond
- 86%
- CritPt
- 5%
- AA-Omniscience
- 43%
- AA-LCR
- 72%
Similar models
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- GPT-5.6 Luna (low)OpenAIQuality Score 42.2Value Score 37.7
- GPT-5.5 Instant (June 2026)OpenAIQuality Score 44.5Value Score 24.8
- GPT-5.6 Luna (high)OpenAIQuality Score 52.8Value Score 48.6
- o3OpenAIQuality Score 38.8Value Score 27.3
- GPT-5.6 Terra (medium)OpenAIQuality Score 55.6Value Score 37.9