OpenAI model product
GPT-5.5-Pro
5, designed for the hardest questions and highest-accuracy work.
Updated Aug 12, 2026. Default version: GPT-5.5 Pro
LLMBoard score75.8GPT-5.5 Pro
Coverage60%4 benchmark families
Context window1.1MTokens
Official input price$30OpenAI API
GPT-5.5-Pro Specifications
Technical details for the model's default version.
- Version
- GPT-5.5 Pro
- Released
- Apr 23, 2026
- Knowledge cutoff
- Dec 1, 2025
- Parameters
- N/A
- Context window
- 1.1M
- Max output
- 128K
- Inputs
- image, pdf, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
GPT-5.5-Pro Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-5.5-Pro Benchmark Results
Benchmark scores for GPT-5.5 Pro.
| GeneBench | 0.3 | 1 | 2 | 100.0% | C | |
| GDPval-MM | 0.8 | 2 | 3 | 50.0% | C | |
| BrowseComp | 0.9 | 4 | 58 | 94.7% | C | |
| FrontierMath | 0.4 | 6 | 17 | 68.8% | C | |
| Humanity's Last Exam | 0.6 | 8 | 93 | 92.4% | C |
GPT-5.5-Pro Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
GPT-5.5-Pro Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- $30 input, $180 output per 1M
- Official provider
- OpenAI
- Lowest third-party
- From $27.27 input, $163.64 output per 1M via Poe
- Tracked offerings
- 14
| Poe | openai/gpt-5.5-pro | global | $27.27 | $163.64 | 400K | |
| Impossibl | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| CrossModel | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| FastRouter | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| LLM Gateway | gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| OpenCode Zen | gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| Neon | gpt-5-5-pro | global | $30 | $180 | 1.1M | |
| ZenMux | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| OrcaRouter | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| Kilo Gateway | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| Vercel AI Gateway | openai/gpt-5.5-pro | global | $30 | $180 | 1M | |
| OpenRouter | openai/gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| OpenAI | gpt-5.5-pro | global | $30 | $180 | 1.1M | |
| Venice AI | openai-gpt-55-pro | global | $37.5 | $225 | 1M |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
GPT-5.5-Pro Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
| GPT-5.5 Pro | 75.8 | N/A | 1.1M | 128K | No | Proprietary |
What is GPT-5.5-Pro?
Key information about GPT-5.5-Pro and its available data.
5, designed for the hardest questions and highest-accuracy work. 5 with significantly more comprehensive, well-structured, and accurate responses, with especially strong performance in business, legal, education, science, and data analysis. Priced at $30/1M input and $180/1M output tokens with a 1M context window.
Data as of 2026-08-11.
GPT-5.5-Pro vs nearby models
Open a comparison with the three ranked models immediately above and below this model.
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FAQ
Common questions about GPT-5.5-Pro.
When was GPT-5.5-Pro released?
GPT-5.5-Pro's default version was released on Apr 23, 2026.
How much does GPT-5.5-Pro cost?
GPT-5.5-Pro's official API price is $30 per million input tokens and $180 per million output tokens via OpenAI. The lowest tracked third-party offer starts at $27.27 input and $163.64 output via Poe.
Who created GPT-5.5-Pro?
GPT-5.5-Pro was created by OpenAI.
What is the context window for GPT-5.5-Pro?
The default version has a 1.1M token context window.
Is GPT-5.5-Pro open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer GPT-5.5-Pro?
14 provider offerings are linked to the default version.
What models should I compare GPT-5.5-Pro with?
Nearby ranked alternatives include Gemini 3.1 Pro, GPT-5.4, GPT-5.6-Luna.