Today's price · per 1M tokens
Input
$30.00
per 1M tokens
Output
$180.00
per 1M tokens
Blended
$67.50
blended $/1M — 3:1 weighted input:output
Source: official OpenAI pricing · read
MODELPRICEWATCH.COM · 2026-10-08
Price receipt
We read OpenAI's own pricing page on and found gpt-5.5-pro listed with a price on the same row — that read is where the number above comes from. We keep the page text we read; its content hash is b9e721a6a8.
Overview
Highest-capability GPT-5.5 tier for the hardest professional and research workloads. 1.05M context, multimodal input.
Capabilities
struck through = not supportedInput 2/4
Text ✓
Image ✓
Audio
Video
Output
Text ✓
Features 3/9
Prompt caching
Reasoning ✓
Coding
Fast inference
Long context ✓
Open weights
Multimodal ✓
Web search
Realtime
Benchmark performance
accuracy % · higher is betterAvg benchmark score43.1%
Perf per $/Mtok0.6
Humanity's Last Exam
43.1%
Independent composite scores
- LMSYS Chatbot Arena: 1510 ELO (Human preference)
How it stacks up
- Ranks #88 of 98 benchmarked models by average score
- Ranks #18 of 191 comparably-measured models by percentile score, across 2 independent measurements
- Ranks #186 of 191 comparably-tested models by normalized performance per dollar
- Strongest at Humanity's Last Exam — 43.1%, #32 of 79
Source: Vellum LLM Leaderboard · updated · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 1M tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on OpenAI's own page