OpenAI
GPT-5.5 (xhigh)
GPT-5.5 (xhigh) is an OpenAI GPT-5.5 profile in this benchmark snapshot, part of the newest GPT-5.5 generation described by OpenAI as its most capable model line for ChatGPT and Codex work. Use this page to compare its reasoning setting against sibling GPT-5.5 variants on intelligence, coding, speed, latency, and price.
Introducing GPT-5.5Operational Metrics
Output Speed66.1 tok/s
First Token40.81s
Blended Price$11.25/M
Model Metadata
Queryable facts extracted from the upstream model payload.
ReleaseApr 23, 2026
Context Windown/a
Modalitiesn/a
Strength: Overall
Rank #1 across 500 models.
60.2
Strength: Coding
Rank #1 across 410 models.
59.1
Strength: GPQA
Rank #2 across 478 models.
93.5%
Watch Area: Output $
Rank #314 across 325 models.
$30.00/M
Watch Area: TTFT
Rank #283 across 293 models.
40.81s
Watch Area: Blended $
Rank #313 across 325 models.
$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.
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 60.2 | #1 |
| Artificial Analysis Coding Index | coding | 59.1 | #1 |
| GPQA | reasoning | 93.5% | #2 |
| Humanity's Last Exam | reasoning | 44.3% | #2 |
| SciCode |