Selected
GPT-5.5 Pro
openai/gpt-5.5-pro
OpenAI / GPT
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
Released
2026-04-23
Context window
1.1M
Max output
128K
Weights
Closed
Modalities
TextInputImageInputDocumentInputTextOutput
Capabilities
AttachmentsReasoningTool callStructured
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