OpenAI O4-Mini 完整指南：新一代推理模型 API 使用教程 2026

import openai

client = openai.OpenAI(
    api_key="你的-crazyrouter-api-key",
    base_url="https://crazyrouter.com/v1"
)

response = client.chat.completions.create(
    model="o4-mini",
    messages=[
        {"role": "user", "content": "证明：对于所有正整数 n，n³ + 2n 能被 3 整除。"}
    ],
    max_completion_tokens=8000
)

print(response.choices[0].message.content)

# 低推理深度 — 快速回答简单问题
response_low = client.chat.completions.create(
    model="o4-mini",
    messages=[{"role": "user", "content": "Python 中 list 和 tuple 的区别？"}],
    reasoning_effort="low",  # low / medium / high
    max_completion_tokens=2000
)

# 高推理深度 — 深度思考复杂问题
response_high = client.chat.completions.create(
    model="o4-mini",
    messages=[{"role": "user", "content": "设计一个分布式锁的实现方案，要求支持可重入、超时释放和公平性。"}],
    reasoning_effort="high",
    max_completion_tokens=16000
)

response = client.chat.completions.create(
    model="o4-mini",
    messages=[
        {"role": "user", "content": """
找出以下代码的 bug 并修复：

```python
def merge_sort(arr):
    if len(arr) <= 1:
        return arr
    mid = len(arr) // 2
    left = merge_sort(arr[:mid])
    right = merge_sort(arr[mid:])
    return merge(left, right)

def merge(left, right):
    result = []
    i = j = 0
    while i < len(left) and j < len(right):
        if left[i] <= right[j]:
            result.append(left[i])
            i += 1
        else:
            result.append(right[j])
    while i < len(left):
        result.append(left[i])
        i += 1
    return result

### Node.js 示例

```javascript
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: '你的-crazyrouter-api-key',
  baseURL: 'https://crazyrouter.com/v1'
});

const response = await client.chat.completions.create({
  model: 'o4-mini',
  messages: [
    { role: 'user', content: '分析以下 SQL 查询的性能问题并优化：SELECT * FROM orders o JOIN users u ON o.user_id = u.id WHERE o.created_at > NOW() - INTERVAL 30 DAY ORDER BY o.total DESC LIMIT 100' }
  ],
  max_completion_tokens: 4000
});

console.log(response.choices[0].message.content);