Chat Completions

Create a chat completion using Doubao models. The content field accepts a plain string for text, or an array of content parts for multimodal input.

Multimodal content types: text, image_url, video_url.

POST /v1/chat/completions

Chat Completions

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "doubao-seed-1-6-251015",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "image_url",
          "image_url": {
            "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png"
          }
        },
        {
          "type": "text",
          "text": "What is in this image?"
        }
      ]
    }
  ],
  "max_tokens": 1024,
  "temperature": 1,
  "top_p": 0.5,
  "stream": false,
  "stop": [
    "<string>"
  ]
}
'

import requests

url = "https://www.anyfast.ai/v1/chat/completions"

payload = {
    "model": "doubao-seed-1-6-251015",
    "messages": [
        {
            "role": "user",
            "content": [
                {
                    "type": "image_url",
                    "image_url": { "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png" }
                },
                {
                    "type": "text",
                    "text": "What is in this image?"
                }
            ]
        }
    ],
    "max_tokens": 1024,
    "temperature": 1,
    "top_p": 0.5,
    "stream": False,
    "stop": ["<string>"]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    model: 'doubao-seed-1-6-251015',
    messages: [
      {
        role: 'user',
        content: [
          {
            type: 'image_url',
            image_url: {
              url: 'https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png'
            }
          },
          {type: 'text', text: 'What is in this image?'}
        ]
      }
    ],
    max_tokens: 1024,
    temperature: 1,
    top_p: 0.5,
    stream: false,
    stop: ['<string>']
  })
};

fetch('https://www.anyfast.ai/v1/chat/completions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://www.anyfast.ai/v1/chat/completions",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'model' => 'doubao-seed-1-6-251015',
    'messages' => [
        [
                'role' => 'user',
                'content' => [
                                [
                                                                'type' => 'image_url',
                                                                'image_url' => [
                                                                                                                                'url' => 'https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png'
                                                                ]
                                ],
                                [
                                                                'type' => 'text',
                                                                'text' => 'What is in this image?'
                                ]
                ]
        ]
    ],
    'max_tokens' => 1024,
    'temperature' => 1,
    'top_p' => 0.5,
    'stream' => false,
    'stop' => [
        '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://www.anyfast.ai/v1/chat/completions"

	payload := strings.NewReader("{\n  \"model\": \"doubao-seed-1-6-251015\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": [\n        {\n          \"type\": \"image_url\",\n          \"image_url\": {\n            \"url\": \"https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png\"\n          }\n        },\n        {\n          \"type\": \"text\",\n          \"text\": \"What is in this image?\"\n        }\n      ]\n    }\n  ],\n  \"max_tokens\": 1024,\n  \"temperature\": 1,\n  \"top_p\": 0.5,\n  \"stream\": false,\n  \"stop\": [\n    \"<string>\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://www.anyfast.ai/v1/chat/completions")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"doubao-seed-1-6-251015\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": [\n        {\n          \"type\": \"image_url\",\n          \"image_url\": {\n            \"url\": \"https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png\"\n          }\n        },\n        {\n          \"type\": \"text\",\n          \"text\": \"What is in this image?\"\n        }\n      ]\n    }\n  ],\n  \"max_tokens\": 1024,\n  \"temperature\": 1,\n  \"top_p\": 0.5,\n  \"stream\": false,\n  \"stop\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://www.anyfast.ai/v1/chat/completions")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"doubao-seed-1-6-251015\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": [\n        {\n          \"type\": \"image_url\",\n          \"image_url\": {\n            \"url\": \"https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png\"\n          }\n        },\n        {\n          \"type\": \"text\",\n          \"text\": \"What is in this image?\"\n        }\n      ]\n    }\n  ],\n  \"max_tokens\": 1024,\n  \"temperature\": 1,\n  \"top_p\": 0.5,\n  \"stream\": false,\n  \"stop\": [\n    \"<string>\"\n  ]\n}"

response = http.request(request)
puts response.read_body

200

{
  "id": "chatcmpl-abc123",
  "object": "chat.completion",
  "created": 1774236644,
  "model": "doubao-seed-1-6-251015",
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "assistant",
        "content": "The image contains 3 models: Doubao-Seed-1.8, DeepSeek-V3.2, GLM-4.7.",
        "reasoning_content": "<string>"
      }
    }
  ],
  "usage": {
    "prompt_tokens": 1355,
    "completion_tokens": 87,
    "total_tokens": 1442,
    "completion_tokens_details": {
      "reasoning_tokens": 53
    }
  }
}

Authorizations

Authorization · string · header · required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json

model · enum<string> · required

The model to use.

Available options: doubao-seed-2.0-pro, doubao-seed-2.0-code, doubao-seed-2.0-lite, doubao-seed-2.0-mini, doubao-seed-1-8-251228, doubao-seed-1-6-flash-250828, doubao-seed-1-6-251015, doubao-seed-1-6-lite-251015, doubao-seed-1-6-vision-250815, glm-4.7

Example:

"doubao-seed-1-6-251015"

messages · object[] · required

Conversation messages. Each message has role and content.

Content array item types:

• text: {"type": "text", "text": "..."}
• image_url: {"type": "image_url", "image_url": {"url": "https://..."}}
• video_url: {"type": "video_url", "video_url": {"url": "https://...", "fps": 2}}

Minimum array length: 1

Show child attributes

Example:

[
  {
    "role": "user",
    "content": [
      {
        "type": "image_url",
        "image_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/ark_demo_img_1.png"
        }
      },
      {
        "type": "text",
        "text": "What is in this image?"
      }
    ]
  }
]

max_tokens · integer

Maximum number of tokens to generate.

Required range: x >= 1

Example:

1024

temperature · number · default: 1

Sampling temperature.

Required range: 0 <= x <= 2

Example:

1

top_p · number

Nucleus sampling parameter.

Required range: 0 <= x <= 1

stream · boolean · default: false

Whether to stream via SSE.

stop · string[]

Up to 4 stop sequences.

Response

200

application/json

Chat completion created successfully

id · string

Example:

"chatcmpl-abc123"

object · string

Example:

"chat.completion"

created · integer

Example:

1774236644

model · string

Example:

"doubao-seed-1-6-251015"

choices · object[]

Show child attributes

usage · object

Show child attributes