GPT 5.1 Thinking

openai/gpt-5.1-thinking

An upgraded version of GPT-5 that adapts thinking time more precisely to the question to spend more time on complex questions and respond more quickly to simpler tasks.

import { streamText } from 'ai'

const result = streamText({
  model: 'openai/gpt-5.1-thinking',
  prompt: 'Why is the sky blue?'
})

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Context 400K

Input Tokens $1.25/M

Output Tokens $10.00/M

Cache Read Tokens $0.13/M

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