OpenAI
GPT-5.6 Luna (medium)
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...
Introducing GPT-5Model Snapshot
ReleaseJul 9, 2026
Context1,050,000
Overall
Rank #66 across 566
38.1
Coding
Rank #79 across 222
50.7
Blended Price
Rank #246 across 371
$2.25/M
Strength Profile
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Benchmark Percentiles
Higher bars mean stronger relative placement.
Model Details
Runtime
Output Speed185.8 tok/s
First Token2.52s
Max Output128,000
Pricing
Blended$2.25/M
Input$1.00/M
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 38.1 | #66 |
| Artificial Analysis Coding Index | coding | 50.7 | #79 |
| GPQA | reasoning | 85.9% | #75 |
| Humanity's Last Exam | reasoning | 24.5% | #83 |
| SciCode |