GPT-5.5 Pro (batch) reasoning
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...
Capabilities
Context Window 1M tokens
Max Output 128k tokens
Inputs
Outputs
Pricing (per 1M tokens)
Input $15.00
Output $90.00
Cache Read -
Cache Write -
Supported Parameters
include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools