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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