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    Anthropic: Claude Opus 4.1

    anthropic/claude-opus-4.1

    Created Aug 5, 2025200,000 context
    $15/M input tokens$75/M output tokens$24/K input imgs

    Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.

    Providers for Claude Opus 4.1

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

    Performance for Claude Opus 4.1

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    Apps using Claude Opus 4.1

    Top public apps this week using this model

    Recent activity on Claude Opus 4.1

    Total usage per day on OpenRouter

    Uptime stats for Claude Opus 4.1

    Uptime stats for Claude Opus 4.1 across all providers

    Sample code and API for Claude Opus 4.1

    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.