OpenAI

gpt-5.5-pro

openai/gpt-5.5-pro
Context

1M

Input

text, image

Output

text

Tool calling

Supported

About this model

GPT-5.5 Pro is the highest-capability model in the 5.5 lineup, optimized for the hardest tasks and long-running workflows. It uses significant compute to 'think' harder before answering, making it ideal for deep research, highly complex coding, and extensive multi-step problem solving.

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Input modalities

text

Accepted as model input

image

Accepted as model input

Providers

Available routing options for this model through OneInfer.

OpenAI
Available

Input tokens

$30.000 / 1M tokens

Output tokens

$180.000 / 1M tokens

Routing

OneInfer optimized

Pricing

Current OneInfer pricing for this model.

UsagePrice
Input tokens$30.000 / 1M tokens
Output tokens$180.000 / 1M tokens

Performance

Published evaluation results associated with this model.

BrowseComp

score90.1

FrontierMath

score39.6

Humanity's Last Exam

score57.2

API example

Refer Documentation
curl https://api.oneinfer.ai/v1/ula/chat/completions \
  -H "Authorization: Bearer $JWT_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.5-pro",
    "messages": [
      { "role": "user", "content": "Hello!" }
    ]
  }'