创建聊天识图（流式）

POST https://www.vortapapi.com/v1/chat/completions

通过 Chat Completions 接口提交对话消息，模型会根据输入内容生成回复。该接口兼容 OpenAI Chat Completions API，可用于文本对话，也可用于包含图片内容的多模态识图场景。

当启用流式输出时，服务会以增量事件的形式持续返回模型生成的内容，适合需要边生成边展示的应用。

参考接口规范：https://platform.openai.com/docs/api-reference/chat/create

请求头

名称	必填	说明
Content-Type	是	请求体格式，通常为 application/json
Accept	是	响应格式；流式请求通常可使用 text/event-stream
Authorization	否	API 鉴权信息，格式为 Bearer sk-***

请求示例

curl https://www.vortapapi.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Accept: text/event-stream" \
  -H "Authorization: Bearer sk-***" \
  -d '{
    "model": "gpt-4o-mini",
    "stream": true,
    "messages": [
      {
        "role": "user",
        "content": [
          {
            "type": "text",
            "text": "请描述这张图片中的内容。"
          },
          {
            "type": "image_url",
            "image_url": {
              "url": "https://example.com/image.jpg"
            }
          }
        ]
      }
    ]
  }'

响应示例

非流式响应示例：

{
  "id": "chatcmpl-123",
  "object": "chat.completion",
  "created": 1677652288,
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "\n\nHello there, how may I assist you today?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 12,
    "total_tokens": 21
  }
}

流式响应示例：

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"choices":[{"index":0,"delta":{"role":"assistant"},"finish_reason":null}]}

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"choices":[{"index":0,"delta":{"content":"这张图片"},"finish_reason":null}]}

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"choices":[{"index":0,"delta":{"content":"展示了一个场景。"},"finish_reason":null}]}

data: {"id":"chatcmpl-123","object":"chat.completion.chunk","created":1677652288,"choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}

data: [DONE]