OpenAI
GPT-5.5 Pro
openai/gpt-5.5-pro
Input
$30.00
per 1M tokens
Output
$180.00
per 1M tokens
Cached input
—
per 1M tokens
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...
- Released
- Context window
- 1M tokens
- Max output
- 128K tokens
- Input
- file, image, text
- Output
- text
- Reasoning
- Yes
Price history
No price changes since we started tracking on .
Providers on OpenRouter
2 endpoints serve this model. Uptime is OpenRouter's share of successful requests; prices per 1M tokens.
| Provider | Input | Output | Context window | Uptime 30 min | Uptime 24 h |
|---|---|---|---|---|---|
| OpenAIflexvendor's owndiscount/priority tier | $15.00 | $90.00 | 1M | — | — |
| OpenAIvendor's own | $30.00 | $180.00 | 1M | — | 100% |