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...
Undisclosed
Parameters
1.1M tokens
Context Window
Proprietary
License
Apr 24, 2026
Released
💰 Pricing
Input
$30.00
per 1M tokens
Output
$180.00
per 1M tokens
API Available
This model is accessible via API for integration into your applications.
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