GPT-4o API定价指南：2025年4月完整成本分析及节省策略

// 昂贵的提示(52 tokens)
"创建一张非常详细的、逼真的金毛猎犬幼犬坐在草地上的图像，背景是明亮的蓝天和一些蓬松的白云，阳光创造出温暖的光芒。"

// 优化后的提示(27 tokens)
"金毛幼犬，草地，蓝天，温暖阳光，逼真风格。"
        

function determineOptimalResolution(usage, isPremiumUser) {
  if (isPremiumUser || usage === 'product-detail') {
    return '1024x1024';
  } else if (usage === 'thumbnail' || usage === 'preview') {
    return '512x512';
  } else {
    return '512x512'; // 默认使用标准分辨率
  }
}
        

// 高效图像缓存系统伪代码
function generateImage(prompt, options) {
  const cacheKey = createHash(prompt + JSON.stringify(options));
  
  if (imageCache.has(cacheKey)) {
    logCacheHit();
    return imageCache.get(cacheKey);
  }
  
  const image = callGPT4oImageAPI(prompt, options);
  imageCache.set(cacheKey, image);
  return image;
}
        

// 不是单独生成图像：
async function generateProductImages(products) {
  return Promise.all(products.map(product => 
    generateSingleImage(product)
  ));
}

// 考虑批处理相关请求：
async function generateBatchedImages(products) {
  // 对相似产品分组
  const productGroups = groupSimilarProducts(products);
  
  // 为每组生成一个基础图像并创建变体
  const results = [];
  for (const group of productGroups) {
    const baseImage = await generateBaseImage(group.template);
    const variations = createVariations(baseImage, group.products);
    results.push(...variations);
  }
  
  return results;
}
        

curl https://api.laozhang.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "model": "gpt-4o-all",
    "stream": false,
    "messages": [
      {"role": "system", "content": "You are a helpful assistant that generates images."},
      {"role": "user", "content": "创建一张山景日落的图像。"}
    ]
  }'
        

function estimateCost(promptLength, resolution = "512x512", quantity = 1) {
  // 计算输入token数量（粗略估计）
  const inputTokens = promptLength / 4; // 约4个字符/token
  
  // 计算输入成本
  const inputCost = (inputTokens / 1000000) * 5.0 * quantity;
  
  // 计算分辨率乘数
  const resMultiplier = 
    resolution === "512x512" ? 1.0 :
    resolution === "1024x1024" ? 1.5 :
    resolution === "2048x2048" ? 2.25 : 1.0;
  
  // 计算输出成本（图像的平均输出tokens）
  const outputCost = 0.008 * resMultiplier * quantity;
  
  return inputCost + outputCost;
}