For customers using the S3 Glacier direct API, pricing for API can be found on the S3 Glacier API pricing page. You pay for requests made against your S3 buckets and objects. S3 request costs are based on the request type, and are charged on the quantity
S3 pricing starts at $0.023/GB for S3 Standard storage class, use this S3 pricing calculator to get AWS S3 cost based on file size and number of upload/downloads.