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    13. © 2025 OpenRouter, Inc

    OpenAI: o3 Pro

    openai/o3-pro

    Created Jun 10, 2025200,000 context
    $20/M input tokens$80/M output tokens$10/K web search

    The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently better answers.

    Note that BYOK is required for this model. Set up here: https://openrouter.ai/settings/integrations

    Sample code and API for o3 Pro

    OpenRouter normalizes requests and responses across providers for you.

    OpenRouter provides an OpenAI-compatible completion API to 400+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

    In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

    Using third-party SDKs

    For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

    See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.