GPT-5.5-PRO
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.
Input
Output
Context
1050K
Max Output
128K
Parameters
—
Technical Specifications
Model TypeChat
Context Window1.1M
Max Output Tokens128K
Parameters—
Training Cutoff—
License—
Capabilities
Input Modalities
fileimagetext
Output Modalities
text
Features
function_callingjson_modereasoningstreamingtext_generationvision
Resources & Links
Related Tools
Data sourced from official provider APIs and documentation
Last updated: May 5, 2026
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