GPT-5.1 pricing & benchmarks
Released Nov 13, 2025 · served by 2 providers · ranked #41 by intelligence in our index
What GPT-5.1 is
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...
- Model ID:
openai/gpt-5.1 - Modality: text+image+file->text
- Tool calling: supported · Structured output: supported
Providers and prices for GPT-5.1
The same model costs different amounts depending on who serves it. Prices are per 1M tokens, cheapest first. Uptime and throughput are OpenRouter's rolling measurements, not vendor claims.
| Provider | Input | Output | Context | Quant | Uptime 24h | Throughput |
|---|---|---|---|---|---|---|
| Azurecheapest | $1.38 | $11.00 | 400K | — | — | — |
| OpenAI | $2.50 | $20.00 | 400K | — | 98.2% | — |
GPT-5.1 benchmark results
Design Arena head-to-head results, as reported through the OpenRouter model API.
| Category | Arena | Rank | Elo | Win rate |
|---|---|---|---|---|
| svg | models | #30 | 1199 | 57.4% |
| mobileapps | agents | #31 | 1124 | 43.5% |
| webapps | agents | #32 | 1075 | 43.3% |
| dataviz | models | #37 | 1234 | 58% |
| gamedev | models | #37 | 1235 | 55.9% |
| asciiart | models | #41 | 1156 | 48.6% |
| uicomponent | models | #47 | 1203 | 53% |
| website | models | #47 | 1212 | 54.1% |
| codecategories | models | #50 | 1202 | 53.1% |
| 3d | models | #78 | 1119 | 43.9% |
Cheaper models in the same class
Models scoring within 4 points of GPT-5.1 on the Intelligence Index, but with a lower output price.
FAQ
How much does the GPT-5.1 API cost?
$1.25 per 1M input tokens and $10.00 per 1M output tokens. A typical workload of 1M input + 300K output tokens costs about $4.25.
Is GPT-5.1 free?
No. It is a paid model starting at $1.25 per 1M input tokens, though some providers offer trial credits.
Which provider is cheapest for GPT-5.1?
Azure at $1.38 input / $11.00 output per 1M tokens.
Can I self-host GPT-5.1?
No. GPT-5.1 is closed-weight and only available through hosted APIs.