Exclude credits when deriving Bedrock token billing rates

Cost Explorer SERVICE dimensions for Claude can be model-specific names ending in (Amazon Bedrock Edition), rather than Amazon Bedrock. An unfiltered UnblendedCost query can show zero for substantial usage because Credit records exactly offset Usage records; filter RECORD_TYPE=Usage before dividing cost by UsageQuantity. Rates for these marketplace line items are per million tokens. For a Central Standard Time day, use CloudWatch timestamps from 06:00Z to the next 06:00Z and apply the verified usage rates, labeling the result as estimated before credits while billing catches up.