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    • © 2025 OpenRouter, Inc

    ByteDance Seed: Seedream 4.5

    bytedance-seed/seedream-4.5

    Created Dec 23, 20254,096 context
    $0/M input tokens$9.581/M output tokens$9.581/M tokens

    Seedream 4.5 is the latest in-house image generation model developed by ByteDance. Compared with Seedream 4.0, it delivers comprehensive improvements, especially in editing consistency, including better preservation of subject details, lighting, and color tone. It also enhances portrait refinement and small-text rendering. The model’s multi-image composition capabilities have been significantly strengthened, and both reasoning performance and visual aesthetics continue to advance, enabling more accurate and artistically expressive image generation.

    Pricing is $0.04 per output image, regardless of size.

    Providers for Seedream 4.5

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

    Performance for Seedream 4.5

    Compare different providers across OpenRouter

    Apps using Seedream 4.5

    Top public apps this month

    Recent activity on Seedream 4.5

    Total usage per day on OpenRouter

    Completion
    1.43M
    Prompt
    1.17M
    Reasoning
    0

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

    Uptime stats for Seedream 4.5

    Uptime stats for Seedream 4.5 across all providers

    Sample code and API for Seedream 4.5

    OpenRouter normalizes requests and responses across providers for you.

    OpenRouter supports image generation through models that have image in their output modalities. These models can create images from text prompts when you specify modalities: ["image", "text"] in your request. The generated images are returned as base64-encoded data URLs in the assistant message. Learn more about image generation.

    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.