GPT-5.1 Instant
GPT-5.1 Instant is the fastest model in the GPT-5.1 family, optimized for low-latency responses across general-purpose tasks, delivering GPT-5.1 generation quality at speeds suited for real-time applications.
Tool UseVision (Image)File InputReasoningImplicit CachingWeb Search
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-instant', prompt: 'Why is the sky blue?'})More models by OpenAI
| Model |
|---|
| 1M | 1.0s | 62tps | $5.00/M | $30.00/M | Read: $0.5/M Write: — | $10.00/K + input costs | — |   | 04/24/2026 | ||||
| 400K | 1.4s | 177tps | $0.75/M | $4.50/M | Read:$0.07/M Write:— | $10.00/K + input costs | — | | 03/17/2026 | ||||
| 400K | 0.5s | 16tps | $0.20/M | $1.25/M | Read:$0.02/M Write:— | $10.00/K + input costs | — | | 03/17/2026 | ||||
| 1.1M | 1.2s | 62tps | $2.50/M | $15.00/M | Read: $0.25/M Write: — | $10.00/K + input costs | — | | 03/05/2026 | ||||
| 400K | 4.4s | 413tps | $0.25/M | $2.00/M | Read:$0.03/M Write:— | $14/K + input costs | — | | 08/07/2025 | ||||
| 131K | 0.1s | 744tps | $0.35/M | $0.75/M | Read:$0.25/M Write:— | — | — |    +5 | 08/05/2025 |