GPT-5.1
OpenAIGPT-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...
In
$1.25
Out
$10.00
Blended
$3.44
Where to buy this model
2 access routes| Route | In | Out | Blended | vs |
|---|---|---|---|---|
| $0.63 | $5.00 | $1.72 | - | |
| $1.25 | $10.00 | $3.44 | +100% |
● official API · ● cloud platform · ● inference host · USD per 1M tokens. Same model, different providers - price and quantization vary.
- Ctx
- 400K
- max output
- 128K
- cache read /1M
- $0.13
- Family
- gpt
- Modalities
- image · text · file
- Features
- json · reasoning · tools
Live pricing, updated 2026-09-15.