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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

Compare
LLMBoard score75.8GPT-5.5 Pro
Coverage40%4 benchmark families
Context window1.1MTokens
Official input price$30OpenAI API

On this page

  • Specification
  • Capability
  • Benchmarks
  • Arena
  • Runtime
  • Pricing
  • Versions
  • About
  • Compare
  • Similar models
  • FAQ

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 category scores

GPT-5.5-Pro Benchmark Results

Benchmark scores for GPT-5.5 Pro.

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Columns

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GeneBench33.2%012100.0%CAug 11, 2026
GDPval-MM82.3%02350.0%CAug 11, 2026
BrowseComp90.1%045894.7%CAug 11, 2026
FrontierMath39.6%061768.8%CAug 11, 2026
Humanity's Last Exam57.2%089392.4%CAug 11, 2026

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 Runtime Performance

Provider-specific output speed and catalog latency for GPT-5.5 Pro. Runtime does not affect the capability score.

No runtime data

No provider-specific speed or latency record is linked to the default version yet.

Browse runtime rankings

Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.

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
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Columns

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Poeopenai/gpt-5.5-proglobal$27.27$163.64400KAug 11, 2026
Impossiblopenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
CrossModelopenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
FastRouteropenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
LLM Gatewaygpt-5.5-proglobal$30$1801.1MAug 11, 2026
OpenCode Zengpt-5.5-proglobal$30$1801.1MAug 11, 2026
Neongpt-5-5-proglobal$30$1801.1MAug 11, 2026
ZenMuxopenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
OrcaRouteropenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
Kilo Gatewayopenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
Vercel AI Gatewayopenai/gpt-5.5-proglobal$30$1801MAug 11, 2026
OpenRouteropenai/gpt-5.5-proglobal$30$1801.1MAug 11, 2026
OpenAIgpt-5.5-proglobal$30$1801.1MAug 11, 2026
Venice AIopenai-gpt-55-proglobal$37.5$2251MAug 11, 2026

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.

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Columns

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GPT-5.5 ProApr 23, 202675.8N/A1.1M128KNoProprietary

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.

GPT-5.5-ProvsGemini 3.1 ProGPT-5.5-ProvsGPT-5.4GPT-5.5-ProvsGPT-5.6-LunaGPT-5.5-ProvsKimi K2.6GPT-5.5-ProvsDeepSeek-V4-ProGPT-5.5-ProvsQwen3.7 Plus

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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.