Today's price · per 1M tokens
Input
$5.00
per 1M tokens
Output
$30.00
per 1M tokens
Blended
$11.25
blended $/1M — 3:1 weighted input:output
Cached input
$0.500
10% of input — prompt caching
Price receipt
We read OpenAI's own pricing page on and found gpt-5.5 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 2959860e9f.
Overview
Frontier model for coding and professional work. 1.05M context window with multimodal input.
Capabilities
struck through = not supportedBenchmark performance
accuracy % · higher is better- AA Intelligence Index: 38.6 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA-Omniscience Index: 20.5 (−100–100)
- GDPval-AA v2: 1491.1 ELO (Real-world work tasks, human baseline = 1000)
- LMSYS Chatbot Arena: 1476.1 ELO (Human preference)
- Ranks #27 of 84 benchmarked models by average score
- Ranks #42 of 181 comparably-measured models by percentile score, across 12 independent measurements
- Ranks #166 of 181 comparably-tested models by normalized performance per dollar
- Strongest at ARC-AGI 2 — 85%, #3 of 35
79 tokens/sec output 76.69s latency to first token (TTFT)
Source: Vellum LLM Leaderboard · updated · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 1M tokens
- Modality
- text, image, audio
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Status
- Current
- Last updated
- Tags
Availability verified: — listed on OpenAI's own page