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...
| Provider | openai |
|---|---|
| Input price | $30.00 / 1M tokens |
| Output price | $180.00 / 1M tokens |
| Context window | 1050k tokens |
| Max output | 128k tokens |
| Modalities | file, image, text |
| Model ID | openai/gpt-5.5-pro |
A 1,000-token prompt with a 500-token answer on OpenAI: GPT-5.5 Pro costs roughly $0.12000. Use the OpenRouter cost calculator to price your own prompt across 400+ models, or the token counter to measure prompt length first.
PromNest stores your prompt library and lets you run any prompt on OpenAI: GPT-5.5 Pro with your own OpenRouter key — including side-by-side comparison with other models. Browse 1,000+ ready-made prompt templates to start.