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Seedream 4.5 作为字节跳动最新的图像生成模型,能力最强,在编辑一致性(如主体细节与光影色调的保持)、人像美化和小字生成方面体验升级。同时,模型的多图组合能力显著增强,推理能力与画面美学持续优化,能够更精准、更具艺术感地呈现创意。
  • 模型ID:doubao-seedream-4.5
  • 模型价格:你可以在模型广场查看最新价格信息
  • 调用入口:https://geekai.co/api/v1/images/generations
  • 模型参数:参考画图 API 手册
  • API认证:获取 API KEY
不支持画图 API 中的以下参数:
  • negative_prompt
  • seed
  • strength
  • aspect_ratio
  • quality
  • style_preset
  • output_format
  • mask
  • background
附:Seedream 4.5 官方 API 文档
Doubao-Seedream-4.5 不支持设置图片宽高比及分辨率,可以通过 size 字段实现,该字段支持两种方式传值:
  • 指定生成图像的分辨率: 2k、4k, 并在prompt中用自然语言描述图片宽高比、图片形状或图片用途,最终由模型判断生成图片的大小。
  • 指定生成图像的宽高像素值,默认值是 2048x2048,对应宽高比为 1:1,此外还可以通过如下像素值生成不同宽高比的图片:
宽高比像素值
1:12048x2048
4:32304x1728
3:41728x2304
16:92560x1440
9:161440x2560
3:22496x1664
2:31664x2496
21:93024x1296
宽高像素值的取值范围为 [2560x1440, 4096x4096]。 宽高比取值范围:[1/16, 16]

文生图

通过给模型提供清晰准确的文字指令,即可快速获得符合描述的高质量单张图片:
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt":"画一只可爱的小猫在草丛中玩耍",
    "size": "2K"
}'
响应是一个 JSON 对象,包含生成图片的 URL:
{
    "model": "doubao-seedream-4.5",
    "created": 1766997450,
    "task_id": "2535fa4a-b5ea-4664-8e33-478e22606d4f",
    "task_status": "succeed",
    "data": [
        {
             "url": "https://static.geekai.co/image/2025/12/29/398b72b457492fbe36c9ac6efc69121b.jpeg"
        }
    ],
    "usage": {
        "billed_units": 1,
        "output_tokens": 16384,
        "total_tokens": 16384
    }
}

图生图

单图 基于已有图片,结合文字指令进行图像编辑,生成新的图像:
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt": "根据这张小猫图片,生成一张和毛线球玩耍的图片",
    "image": "https://static.geekai.co/image/2025/12/29/398b72b457492fbe36c9ac6efc69121b.jpeg",
    "size": "2K"
}'
响应是一个 JSON 对象,包含生成图片的 URL:
{
    "model": "doubao-seedream-4.5",
    "created": 1766999002,
    "task_id": "20d598c9-703b-4ac1-8d8b-3a17917f7c71",
    "task_status": "succeed",
    "data": [
        {
            "url": "https://static.geekai.co/image/2025/12/29/c0c888a2acc9a0cdb27c49878571dd2f.jpeg"
        }
    ],
    "usage": {
        "billed_units": 1,
        "output_tokens": 16384,
        "total_tokens": 16384
    }
}
多图 根据您输入的文本描述和多张参考图片,融合它们的风格、元素等特征来生成新图像:
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt": "将图1的服装换为图2的服装",
    "image": ["https://ark-project.tos-cn-beijing.volces.com/doc_image/seedream4_imagesToimage_1.png", "https://ark-project.tos-cn-beijing.volces.com/doc_image/seedream4_5_imagesToimage_2.png"],
    "size": "4k",
    "watermark": false,
}'
响应是一个 JSON 对象,包含生成图片的 URL:
{
    "model": "doubao-seedream-4.5",
    "created": 1767663594,
    "task_id": "0785df56-af20-49bb-9b5d-3b082e244482",
    "task_status": "succeed",
    "data": [
        {
            "url": "https://static.geekai.co/image/2026/01/06/884c492ff60dafa1bed2b2113a360582.jpeg"
        }
    ],
    "usage": {
        "billed_units": 1,
        "output_tokens": 65536,
        "total_tokens": 65536
    }
}

组图生成

支持通过一张或者多张图片和文字信息,生成漫画分镜、品牌视觉等一组内容关联的图片: 文生组图
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt": "生成一组共4张连贯插画,核心为同一庭院一角的四季变迁,以统一风格展现四季独特色彩、元素与氛围",
    "size": "2K",
    "response_format": "url",
    "watermark": true,
    "extra_body": {
        "sequential_image_generation": "auto",
        "sequential_image_generation_options": {
            "max_images": 4
        }
    }
}'
响应是一个 JSON 对象,其中包含生成的组图列表:
{
    "model": "doubao-seedream-4.5",
    "created": 1767009952,
    "task_id": "0ebe205a-ecd3-446a-8751-6923c2e9f70b",
    "task_status": "succeed",
    "data": [
        {
            "url": "https://static.geekai.co/image/2025/12/29/c5ea6a6601a75d5cd377b287d9a5f0c9.jpeg"
        },
        {
            "url": "https://static.geekai.co/image/2025/12/29/ec90634ffadd295d6cdefebcd739a581.jpeg"
        },
        {
            "url": "https://static.geekai.co/image/2025/12/29/fe354ed6415711fa316edd9e58ec3453.jpeg"
        },
        {
            "url": "https://static.geekai.co/image/2025/12/29/7d4d557691a06bf41dcaeddadd0bbe99.jpeg"
        }
    ],
    "usage": {
        "billed_units": 4,
        "output_tokens": 62208,
        "total_tokens": 62208
    }
}
单张图生组图
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt": "参考这个LOGO,做一套户外运动品牌视觉设计,品牌名称为'GREEN',包括包装袋、帽子、卡片、挂绳等。绿色视觉主色调,趣味、简约现代风格",
    "image": "https://ark-project.tos-cn-beijing.volces.com/doc_image/seedream4_imageToimages.png",
    "size": "2K",
    "response_format": "url",
    "watermark": false,
    "extra_body":{
        "sequential_image_generation": "auto",
        "sequential_image_generation_options": {
            "max_images": 4
        }
    }
}'
响应和文生组图一样, 是JSON 对象,其中包含生成的组图列表 多张图生组图
curl --location --request POST 'https://geekai.co/api/v1/images/generations' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer $GEEKAI_API_KEY' \
--data '{
    "model":"doubao-seedream-4.5",
    "prompt": "生成女孩和奶牛玩偶在游乐园开心地坐过山车的图片,涵盖早晨、中午、晚上",
    "image": ["https://ark-project.tos-cn-beijing.volces.com/doc_image/seedream4_imagesToimages_1.png", "https://ark-project.tos-cn-beijing.volces.com/doc_image/seedream4_imagesToimages_2.png"],
    "size": "2K",
    "response_format": "url",
    "watermark": false,
    "extra_body":{
        "sequential_image_generation": "auto",
        "sequential_image_generation_options": {
            "max_images": 3
        }
    }
}'
响应和文生组图一样, 是JSON 对象,其中包含生成的组图列表