> ## Documentation Index > Fetch the complete documentation index at: https://docs.geekai.co/llms.txt > Use this file to discover all available pages before exploring further. # Doubao-Seedream-4.5 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](https://geekai.co/models?platform=bytedance\&type=image)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](https://docs.geekai.co/cn/api/image/generations) * API认证：[获取 API KEY](https://docs.geekai.co/cn/docs/quick_start) 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](https://www.volcengine.com/docs/82379/1824121) 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： | 分辨率 | 宽高比 | 像素值 | | --- | ---- | --------- | | 2K | 1:1 | 2048x2048 | | | 4:3 | 2304x1728 | | | 3:4 | 1728x2304 | | | 16:9 | 2848x1600 | | | 9:16 | 1600x2848 | | | 3:2 | 2496x1664 | | | 2:3 | 1664x2496 | | | 21:9 | 3136x1344 | | 4K | 1:1 | 4096x4096 | | | 4:3 | 3520x4704 | | | 3:4 | 4704x3520 | | | 16:9 | 5504x3040 | | | 9:16 | 3040x5504 | | | 3:2 | 3328x4992 | | | 2:3 | 4992x3328 | | | 21:9 | 6240x2656 | ### 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： ```bash theme={null} 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： ```json theme={null} { "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： ```bash theme={null} 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： ```json theme={null} { "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： ```bash theme={null} 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： ```json theme={null} { "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** ```bash theme={null} 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： ```json theme={null} { "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** ```bash theme={null} 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** ```bash theme={null} 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