OpenAI
GPT-5.5
openai/gpt-5.5
Input
$5.00
per 1M tokens
Output
$30.00
per 1M tokens
Cached input
$0.50
per 1M tokens
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
- 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
7 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 | $2.50 | $15.00 | 1M | — | 100% |
| OpenAIvendor's own | $5.00 | $30.00 | 1M | 100% | 100% |
| Azure | $5.00 | $30.00 | 1M | 100% | 99.59% |
| Azureus | $5.50 | $33.00 | 1M | — | 100% |
| Amazon Bedrockus-east-1 | $5.50 | $33.00 | 1M | — | — |
| Azureeu | $5.50 | $33.00 | 1M | — | — |
| OpenAIfastvendor's own | $12.50 | $75.00 | 1M | — | — |