GPT 5.1 Thinking
GPT 5.1 Thinking is the reasoning-focused member of the GPT-5.1 family, applying extended chain-of-thought computation to produce more thorough and accurate responses on complex analytical, scientific, and multi-step problems.
Tool UseImplicit CachingFile InputReasoningVision (Image)Web SearchImage Gen
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-thinking', prompt: 'Why is the sky blue?'})Providers
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| Provider |
|---|
 OpenAI | 400K | 1.4s | 72tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $10.00/K + input costs | — | +5 | 11/12/2025 | ||
 Azure | 400K | 0.8s | 54tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $14/K + input costs | — | +3 | 11/12/2025 |