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    • © 2026 OpenRouter, Inc

    DeepSeek: R1 0528

    deepseek/deepseek-r1-0528

    Created May 28, 2025131,072 context
    $0.45/M input tokens$2.15/M output tokens

    May 28th update to the original DeepSeek R1 Performance on par with OpenAI o1, but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass.

    Fully open-source model.

    Recent activity on R1 0528

    Total usage per day on OpenRouter

    Prompt
    844M
    Reasoning
    88.6M
    Completion
    25.7M

    Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.