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...
OpenAI: GPT-5.5 Pro — OpenAI. Context window 1,050,000 tokens. API pricing (per 1M tokens): Input $30, Output $180. License: Proprietary.
| Provider | OpenAI |
|---|---|
| API model ID | openai/gpt-5.5-pro |
| Tier | Frontier |
| Context window | 1,050,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $30 |
| API pricing (per 1M tokens) · Output | $180 |