Gemini 3 Flash Preview 完整指南：Google 最新轻量模型 API 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="gemini-3-flash-preview",
    messages=[
        {"role": "system", "content": "你是一个简洁高效的AI助手。"},
        {"role": "user", "content": "用三句话解释什么是 Kubernetes。"}
    ],
    max_tokens=500,
    temperature=0.3
)

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

response = client.chat.completions.create(
    model="gemini-3-flash-preview",
    messages=[
        {"role": "system", "content": "提取文本中的实体信息，以 JSON 格式返回。"},
        {"role": "user", "content": "张三，28岁，在北京的字节跳动工作，月薪 50K。"}
    ],
    response_format={"type": "json_object"},
    max_tokens=500
)

import json
data = json.loads(response.choices[0].message.content)
print(data)
# {"name": "张三", "age": 28, "city": "北京", "company": "字节跳动", "salary": "50K"}

# 读取长文档
with open("annual_report.txt", "r") as f:
    long_document = f.read()  # 假设 50,000+ tokens

response = client.chat.completions.create(
    model="gemini-3-flash-preview",
    messages=[
        {"role": "system", "content": "你是一个专业的财务分析师。"},
        {
            "role": "user",
            "content": f"分析以下年报中的关键财务指标并生成摘要：\n\n{long_document}"
        }
    ],
    max_tokens=3000
)

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

import OpenAI from 'openai';

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

const stream = await client.chat.completions.create({
  model: 'gemini-3-flash-preview',
  messages: [
    { role: 'user', content: '列出 2026 年最值得学习的 5 个前端技术。' }
  ],
  stream: true,
  max_tokens: 1000
});

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

curl https://crazyrouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer 你的-crazyrouter-api-key" \
  -d '{
    "model": "gemini-3-flash-preview",
    "messages": [{"role": "user", "content": "Hello, Gemini 3 Flash!"}],
    "max_tokens": 500,
    "stream": true
  }'