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o3 Pro

o3 Pro applies maximum reasoning compute to the o3 architecture, delivering the deepest chain-of-thought analysis available for the most demanding mathematical, scientific, and analytical problems.

ReasoningVision (Image)File InputTool UseWeb Search
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/o3-pro',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • How does o3 Pro differ from standard o3?

    It applies more compute per request, enabling deeper and more exhaustive chain-of-thought reasoning. The improvement is most significant on the hardest problems.

  • When is the premium cost justified?

    For frontier mathematical proofs, critical scientific analysis, security audits, and other problems where the deepest possible reasoning produces meaningfully better outcomes.

  • What context window does o3 Pro support?

    200K tokens, matching the o3 family.

  • Is o3 Pro slower than o3?

    Yes. The additional reasoning compute increases response time. Reserve it for problems where depth justifies the wait.

  • How does AI Gateway handle authentication for o3 Pro?

    AI Gateway accepts a single API key or OIDC token for all requests. You don't embed OpenAI credentials in your application; AI Gateway routes and authenticates on your behalf.

  • What are typical latency characteristics?

    This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic.