OpenAI: GPT-5.5 Pro
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 workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Modalities
In / Out Price
$30 / $180 per 1M
Context
1.1M
Released
Apr 24, 2026
Knowledge Cutoff
Dec 2025
Apps using this model
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