GPT-5.5 Pro (batch)
OpenAI
openai/gpt-5.5-pro:batchGPT-5.5 Pro is the extended-reasoning tier of GPT-5.5 for the hardest coding, research, and analytical tasks. This is the batch variant for cheaper asynchronous processing.
Cost rate
18x
Context
1.1M
Released
Apr 24, 2026
Input
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Output
Text
Support
ReasoningTool callingStructured outputs