OpenAI API 使用文档

OpenAI 提供两套主要 API：Chat Completions API（经典）和 Responses API（新一代，推荐用于智能体场景）。

安装

Python

pip install openai

JavaScript

npm install openai

curl

# curl 无需安装，系统自带

获取 API Key

前往 cheapertoken 创建 API Key。

Chat Completions API（流式）

注意：此平台的 Chat Completions API 仅支持流式调用（stream=True）。

Python

from openai import OpenAI

client = OpenAI(api_key="your-api-key", base_url="https://www.cheapertoken.work/v1")

stream = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{"role": "user", "content": "你好，请介绍一下你自己"}],
    stream=True,
)

for chunk in stream:
    if chunk.choices[0].delta.content is not None:
        print(chunk.choices[0].delta.content, end="", flush=True)

JavaScript

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: "your-api-key",
  baseURL: "https://www.cheapertoken.work/v1",
});

const stream = await client.chat.completions.create({
  model: "gpt-5.4",
  messages: [{ role: "user", content: "你好，请介绍一下你自己" }],
  stream: true,
});

for await (const chunk of stream) {
  const content = chunk.choices[0]?.delta?.content;
  if (content) process.stdout.write(content);
}

curl

curl https://www.cheapertoken.work/v1/chat/completions \
  -H "Authorization: Bearer your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4",
    "messages": [{"role": "user", "content": "你好，请介绍一下你自己"}],
    "stream": true
  }'

Responses API（新一代）

Responses API 是 OpenAI 推荐用于构建智能体的新 API，支持内置工具（网络搜索等）。

Python

from openai import OpenAI

client = OpenAI(api_key="your-api-key", base_url="https://www.cheapertoken.work/v1")

response = client.responses.create(
    model="gpt-5.4",
    input="你好，请介绍一下你自己"
)
print(response.output_text)

JavaScript

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: "your-api-key",
  baseURL: "https://www.cheapertoken.work/v1",
});

const response = await client.responses.create({
  model: "gpt-5.4",
  input: "你好，请介绍一下你自己",
});
console.log(response.output_text);

curl

curl https://www.cheapertoken.work/v1/responses \
  -H "Authorization: Bearer your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4",
    "input": "你好，请介绍一下你自己"
  }'

常用模型

模型	说明
gpt-5.4	旗舰模型，能力强
gpt-5.4-mini	轻量版，速度快成本低
gpt-image-2	图像生成模型