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OpenAI: GPT-5.5 Pro

openai/gpt-5.5-pro
Apr 24, 20261.1M context128K max output$30.00/M in · $180.00/M outReasoning

Description

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, and is designed for long-horizon problem solving, agentic coding, and precise execution across multi-step workflows.

Specifications

Provider
openai
Context Length
1.1M
Max Output
128K
Modality
Infileimagetext
Outtext

Pricing

TypePrice / 1M tokens
Input$30.00
Output$180.00
Web Search$0.01 / call

Quick Start

curl https://api.ominigate.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-omg-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.5-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
OpenAI: GPT-5.5 Pro — Pricing & API on OminiGate