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    Kwaipilot: Kat Coder (free)Free variant

    kwaipilot/kat-coder-pro:free

    Created Nov 10, 2025256,000 context
    $0/M input tokens$0/M output tokens

    KAT-Coder is the flagship coding model from Kwaipilot. It achieves an exceptional 73.4% resolution rate on SWE-Bench Verified.

    KAT-Coder was trained using advanced multi-stage training including mid-training, supervised fine-tuning (SFT), reinforcement fine-tuning (RFT), and large-scale agentic reinforcement learning (RL) on enterprise codebases.

    Providers for Kat Coder (free)

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

    Performance for Kat Coder (free)

    Compare different providers across OpenRouter

    Apps using Kat Coder (free)

    Top public apps this week using this model

    Recent activity on Kat Coder (free)

    Total usage per day on OpenRouter

    Uptime stats for Kat Coder (free)

    Uptime stats for Kat Coder (free) across all providers

    Sample code and API for Kat Coder (free)

    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.