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    13. © 2025 OpenRouter, Inc

    OpenAI: ChatGPT-4o

    openai/chatgpt-4o-latest

    Created Aug 14, 2024128,000 context
    $5/M input tokens$15/M output tokens

    OpenAI ChatGPT 4o is continually updated by OpenAI to point to the current version of GPT-4o used by ChatGPT. It therefore differs slightly from the API version of GPT-4o in that it has additional RLHF. It is intended for research and evaluation.

    OpenAI notes that this model is not suited for production use-cases as it may be removed or redirected to another model in the future.

    Sample code and API for ChatGPT-4o

    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.