Completions API

概述

GPT-5.4 Pro 只能通过 Completions API（/v1/completions）调用，不支持 Chat Completions API。它支持多轮模型交互和高级 API 特性。请使用 prompt 字段（字符串或数组）而非 messages。

接口

可用模型

价格单位：每 1M tokens

请求参数

基本请求

curl -X POST https://apimodels.app/api/v1/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4-pro",
    "prompt": "Write a detailed analysis of quantum computing:",
    "max_tokens": 1024
  }'

响应格式

{
  "id": "cmpl-abc123",
  "object": "text_completion",
  "created": 1700000000,
  "model": "gpt-5.4-pro",
  "choices": [
    {
      "text": "Quantum computing leverages the principles of quantum mechanics...",
      "index": 0,
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 12,
    "completion_tokens": 256,
    "total_tokens": 268
  }
}

流式响应

设置 stream: true 以接收 Server-Sent Events (SSE)。

curl -X POST https://apimodels.app/api/v1/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4-pro",
    "prompt": "Explain the theory of relativity:",
    "max_tokens": 1024,
    "stream": true
  }'

计费

积分根据实际 token 使用量计算：

费用 = (prompt_tokens * 输入价格 + completion_tokens * 输出价格) / 1,000,000
积分 = 费用(人民币)  // 积分即为 ¥

错误码