o3-pro

Use the model ID o3-pro through the compatible chat completions endpoint. Note that BYOK (Bring Your Own Key) is required. Set up your key before sending requests.

o3-pro is billed per use and the record publishes no free-tier allowance. The current published rates are input $20.0000 per 1M tokens and output $80.0000 per 1M tokens. Trial credit or promotional quota is tied to your account rather than to the model, so check the console before planning around a free tier.

Test your most demanding reasoning tasks and confirm the model’s accuracy meets your requirements. Account for the higher latency from extended reasoning. Verify BYOK setup and monitor cost against your budget.

For o3-pro, set the max_tokens or max_completion_tokens parameter to control spending per call. Start with a budget aligned to your typical response length and increase only when longer outputs are genuinely needed. Monitor token usage in the API response headers to tune your budget over time.

As a reasoning-focused model, o3-pro’s capabilities should be confirmed against the current documentation. Test your specific tool definitions and structured output schemas before production use.

Compare o3-pro against models of similar capability and pricing on your actual workload. Evaluate latency, output quality, instruction following, and cost per task. Run side-by-side tests with your own prompts — the best model depends on your specific use case, not just benchmark scores.

o3-pro supports prompt caching, which can significantly reduce costs for repeated prompts with shared prefixes. The cache read price is substantially lower than the standard input price. Check the current pricing page for the exact cache hit discount ratio for o3-pro.