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    OpenAI: GPT-5 Nano

    openai/gpt-5-nano

    Created Aug 7, 2025400,000 context
    $0.05/M input tokens$0.40/M output tokens$10/K web search

    GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.

    Providers for GPT-5 Nano

    OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

    Performance for GPT-5 Nano

    Compare different providers across OpenRouter

    Apps using GPT-5 Nano

    Top public apps this week using this model

    Recent activity on GPT-5 Nano

    Total usage per day on OpenRouter

    Uptime stats for GPT-5 Nano

    Uptime stats for GPT-5 Nano across all providers

    Sample code and API for GPT-5 Nano

    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.