跳转到主要内容
AnyFast 兼容火山方舟 Ark Chat API。如果你已在使用 Ark SDK 或直接调用 Ark API，只需更改 base URL 即可切换到 AnyFast，无需重写代码。

​
端点

POST https://www.anyfast.ai/v1/chat/completions
POST https://www.anyfast.ai/v1/responses

​
认证

Authorization: Bearer YOUR_API_KEY

​
支持的模型

模型描述
doubao-seed-2.0-pro豆包 Seed 2.0 Pro — 最强能力
doubao-seed-2.0-code豆包 Seed 2.0 Code — 编程优化
doubao-seed-2.0-lite豆包 Seed 2.0 Lite — 平衡之选
doubao-seed-2.0-mini豆包 Seed 2.0 Mini — 快速轻量
doubao-seed-1-8-251228豆包 Seed 1.8
doubao-seed-1-6-flash-250828豆包 Seed 1.6 Flash — 极速推理
doubao-seed-1-6-251015豆包 Seed 1.6
doubao-seed-1-6-lite-251015豆包 Seed 1.6 Lite
doubao-seed-1-6-vision-250815豆包 Seed 1.6 Vision — 多模态
glm-4-7-251222GLM-4-7

​
支持的输入类型

内容Chat API typeChat API 数据字段Responses API typeResponses API 数据字段
文本texttextinput_texttext
图片image_urlimage_url.urlinput_imageimage_url（字符串）
视频video_urlvideo_url.url + video_url.fpsinput_videovideo_url（字符串）+ fps
文档——input_filefile_url 或 file_data + filename
所有内容类型均支持 URL 和 Base64 Data URI 两种格式。

​
功能特性

  • 流式输出 — 设置 stream: true 通过 SSE 实时流式传输 token
  • 函数调用 — 使用 tools 和 tool_choice 参数
  • 推理链 — 模型返回 reasoning_content 思维链内容
  • 图片理解 — 通过 image_url / input_image 发送图片
  • 视频理解 — 通过 video_url / input_video 发送视频，支持 fps 抽帧控制
  • 文档理解 — 通过 input_file 发送 PDF 等文档（仅 Responses API）
  • 多轮对话 — 在 messages / input 中包含完整的对话历史

​
Chat Completions API

​
文本对话

curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-2.0-pro",
    "messages": [
      {"role": "user", "content": "你好！"}
    ]
  }'

​
图片理解（URL）

cURL
curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "messages": [
      {
        "role": "user",
        "content": [
          {"type": "image_url", "image_url": {"url": "https://example.com/photo.jpg"}},
          {"type": "text", "text": "图片里有什么？"}
        ]
      }
    ],
    "max_tokens": 100
  }'

​
图片理解（Base64）

cURL
curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "messages": [
      {
        "role": "user",
        "content": [
          {"type": "image_url", "image_url": {"url": "data:image/png;base64,{BASE64_IMAGE}"}},
          {"type": "text", "text": "图片里有什么？"}
        ]
      }
    ]
  }'

​
视频理解（URL + fps）

fps 参数控制每秒抽帧数，默认 1，范围 0.2–5。
cURL
curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "messages": [
      {
        "role": "user",
        "content": [
          {"type": "video_url", "video_url": {"url": "https://example.com/clip.mp4", "fps": 2}},
          {"type": "text", "text": "视频中出现了哪些建筑？"}
        ]
      }
    ],
    "max_tokens": 200
  }'

​
视频理解（Base64）

cURL
curl https://www.anyfast.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "messages": [
      {
        "role": "user",
        "content": [
          {"type": "video_url", "video_url": {"url": "data:video/mp4;base64,{BASE64_VIDEO}"}},
          {"type": "text", "text": "视频里有什么？"}
        ]
      }
    ]
  }'

​
Responses API

​
文本对话

cURL
curl https://www.anyfast.ai/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-2.0-pro",
    "input": "你好，用一句话介绍你自己"
  }'

​
图片理解（URL）

cURL
curl https://www.anyfast.ai/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "input": [
      {
        "role": "user",
        "content": [
          {"type": "input_image", "image_url": "https://example.com/photo.jpg"},
          {"type": "input_text", "text": "图片里有什么？"}
        ]
      }
    ]
  }'

​
视频理解（URL + fps）

cURL
curl https://www.anyfast.ai/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-1-6-251015",
    "input": [
      {
        "role": "user",
        "content": [
          {"type": "input_video", "video_url": "https://example.com/clip.mp4", "fps": 1},
          {"type": "input_text", "text": "视频里有什么？"}
        ]
      }
    ]
  }'

​
文档理解（URL）

文档理解仅支持 Responses API。
cURL
curl https://www.anyfast.ai/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-2.0-lite",
    "input": [
      {
        "role": "user",
        "content": [
          {"type": "input_file", "file_url": "https://example.com/document.pdf"},
          {"type": "input_text", "text": "按段落给出文档中的文字内容"}
        ]
      }
    ]
  }'

​
文档理解（Base64）

cURL
curl https://www.anyfast.ai/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-2.0-lite",
    "input": [
      {
        "role": "user",
        "content": [
          {"type": "input_file", "file_data": "data:application/pdf;base64,{BASE64_PDF}", "filename": "document.pdf"},
          {"type": "input_text", "text": "按段落给出文档中的文字内容"}
        ]
      }
    ]
  }'

​
fps 参数说明

fps 值适用场景
0.2–0.5画面变化不频繁，如静态监控
1（默认）通用场景
2–5画面变化剧烈，如动作计数、体育赛事

​
文件大小限制

传入方式图片限制视频限制文档限制
URL< 10 MB< 50 MB< 50 MB
Base64< 10 MB（请求体 < 64 MB）< 50 MB（请求体 < 64 MB）< 50 MB（请求体 < 64 MB）

​
流式输出示例

stream = client.chat.completions.create(
    model="doubao-seed-2.0-pro",
    messages=[
        {"role": "user", "content": "写一首短诗"}
    ],
    stream=True
)

for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="")