OpenAI
GPT-5.1
openai/gpt-5.1
Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Cached input
$0.125
per 1M tokens
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
- Released
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input
- image, text, file
- Output
- text
- Reasoning
- Yes
Price history
No price changes since we started tracking on .
Providers on OpenRouter
5 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 | $0.625 | $5.00 | 400K | 100% | 100% |
| Azure | $1.25 | $10.00 | 400K | 100% | 100% |
| OpenAIvendor's own | $1.25 | $10.00 | 400K | 100% | 100% |
| Azureswedencentral | $1.38 | $11.00 | 400K | — | 100% |
| OpenAIfastvendor's own | $2.50 | $20.00 | 400K | — | — |