OpenAI GPT模型选择与API接入教程

from openai import OpenAI

client = OpenAI()  # 自动读取 OPENAI_API_KEY

# 基础对话
completion = client.chat.completions.create(
    model="gpt-5",
    messages=[
        {"role": "system", "content": "你是一个专业的AI助手"},
        {"role": "user", "content": "用Python写一个快速排序算法"}
    ],
    temperature=0.7,
    max_tokens=2000
)
print(completion.choices[0].message.content)

# 流式输出
stream = client.chat.completions.create(
    model="gpt-5",
    messages=[{"role": "user", "content": "写一篇关于AI的文章"}],
    stream=True
)
for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="")