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OpenAI: GPT-5.5

openai/gpt-5.5
Apr 24, 20261.1M context128K max output$5.00/M in · $30.00/M outReasoning

Description

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.

Specifications

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

Pricing

Type≤272K>272K
Input$5.00$10.00
Output$30.00$45.00
Cache Read$0.50$1.00
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",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'