Bytedance Seedream 4.5 API | Pricing & Docs

bytedance/seedream-4-5/edit

字节跳动的 Seedream 4.5 Edit 图像编辑模型提供专业的 4K 图像处理能力和增强的提示词理解，通过 RunComfy 的 Playground 和 API 即时可用。

1. Get started

Use RunComfy's API to run bytedance/seedream-4-5/edit. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seedream-4-5/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The man is riding a motor cycle on the road"
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seedream-4-5/edit \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "The man is riding a motor cycle on the road"
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id, in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input",
  "required": [
    "prompt",
    "image_urls"
  ],
  "properties": {
    "prompt": {
      "title": "提示词",
      "description": "建议长度不超过 600 个英文单词。如果提示词过长，信息可能会分散。模型可能会忽略细节，只关注要点，导致生成的图像缺少元素。",
      "type": "string",
      "default": "The man is riding a motor cycle on the road"
    },
    "images": {
      "title": "图像",
      "description": "上传 1~14 张图像。格式必须为 jpeg 或 png",
      "type": "array",
      "items": {
        "type": "string",
        "format": "image_uri"
      },
      "validations": [
        {
          "validation_rule": "file_size_mb<",
          "validation_value": 10,
          "validation_error": "文件大小必须小于 10 MB。"
        },
        {
          "validation_rule": "width/height>",
          "validation_value": 0.0625,
          "validation_error": "宽高比范围应为 1:16 到 16:1。"
        },
        {
          "validation_rule": "width/height<",
          "validation_value": 16,
          "validation_error": "宽高比范围应为 1:16 到 16:1。"
        },
        {
          "validation_rule": "width_pixels>",
          "validation_value": 14,
          "validation_error": "上传图像的宽度和高度必须超过 14 像素。"
        },
        {
          "validation_rule": "height_pixels>",
          "validation_value": 14,
          "validation_error": "上传图像的宽度和高度必须超过 14 像素。"
        }
      ],
      "maxItems": 14,
      "minItems": 1,
      "default": [
        "https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-1.png",
        "https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-2.png",
        "https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-3.png"
      ]
    },
    "resolution": {
      "title": "分辨率",
      "description": "对于 2K 和 4K 选项，模型将自动确定宽度和高度。您应该在提示词中用自然语言描述其宽高比、形状或用途。对于其他选项，您可以选择所需的宽度和高度。",
      "type": "string",
      "enum": [
        "2K",
        "4K",
        "2048x2048 (1:1)",
        "2304x1728 (4:3)",
        "1728x2304 (3:4)",
        "2560x1440 (16:9)",
        "1440x2560 (9:16)",
        "2496x1664 (3:2)",
        "1664x2496 (2:3)",
        "3024x1296 (21:9)",
        "4096x4096 (1:1)"
      ],
      "default": "2048x2048 (1:1)"
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": { "type": "string", "format": "uri" }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": { "type": "string", "format": "uri" }
      }
    }
  }
}

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

Seedream 4.5 Edit 图像编辑免费：AI图片编辑、图生图、局部重绘与换背景 | RunComfy