OpenAI: GPT-5.5 Pro
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloa…
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Open / InstallLast updated July 27, 2026
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...
Author
openai
Platform
api
Pricing model
paid
Categories
Research
Tags
openrouter
llm
openai
file
image
text
Capabilities
- Image input
- 1,050,000 token context