LLM Leaderboard
GPT-5.5 Pro
by OpenAI Reasoning
RunFree Score
—
insufficient data
Blended price
$67.50
per 1M tokens
Context
1.1M
tokens
Max output
128K
tokens
Output speed
—
tokens / sec
Latency (TTFT)
—
first token
Uptime
100.0%
last 24h
Providers
1
serving this model
Capability profile
Not enough categorised benchmark data to chart a profile yet.
Compare GPT-5.5 Pro
See it side by side with any other model — benchmarks, price and specs.
Benchmark results
| Benchmark | Category | Score | As of | Source |
|---|---|---|---|---|
| Humanity's Last Exam | knowledge | 43.1% | May 28, 2026 | cite |
Every score links to its original source. See our methodology for how the RunFree Score is computed.
API pricing
- Input
- $30.00 / 1M
- Output
- $180 / 1M
- Cached input
- —
- Blended (3:1)
- $67.50 / 1M
Specifications
- Provider
- OpenAI
- Context window
- 1.1M
- Max output
- 128K
- Reasoning model
- Yes
- Modality
- multimodal
- Released
- Apr 24, 2026