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GPT 5.5 Pro

GPT 5.5 Pro is the higher-capability tier of the GPT-5.5 family, applying more compute per request for deeper analysis on the hardest tasks while keeping the same modalities and APIs as standard GPT-5.5.

ReasoningTool UseImplicit CachingFile InputWeb SearchVision (Image)
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.5-pro',
  prompt: 'Why is the sky blue?'
})
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Try out GPT 5.5 Pro by OpenAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.