OpenAI
GPT-5.5 (xhigh)
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Introducing GPT-5.5Model Snapshot
ReleaseApr 23, 2026
Context1,050,000
Overall
Rank #7 across 566
54.8
Coding
Rank #7 across 222
74.9
Blended Price
Rank #353 across 371
$11.25/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 Speed73.9 tok/s
First Token53.99s
Max Output128,000
Pricing
Blended$11.25/M
Input$5.00/M
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 54.8 | #7 |
| Artificial Analysis Coding Index | coding | 74.9 | #7 |
| LiveBench Mathematics | math | 95.9% | #3 |
| GPQA | reasoning | 93.5% | #3 |