OpenAI
GPT-5.6 Luna (xhigh)
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 #25 across 566
49.1
Coding
Rank #31 across 222
68.6
Blended Price
Rank #243 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 Speed185.7 tok/s
First Token30.08s
Max Output128,000
Pricing
Blended$2.25/M
Input$1.00/M
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 49.1 | #25 |
| Artificial Analysis Coding Index | coding | 68.6 | #31 |
| LiveBench Mathematics | math | 86.3% | #19 |
| GPQA | reasoning | 89.5% | #39 |