Your Claude bill, itemized by a butler.

Paste a usage CSV export from the Anthropic Console. Winthrop prices every token against the current rate card and identifies what you are overpaying for: uncached prefixes, top-tier models doing routine work, synchronous calls that could ride the half-price batch lane.

The analysis is pure arithmetic. Your data is never sent to a model, never used for anything but your report, and expires from storage after 60 days. The summary is free; the full itemized report with every recommendation is $19.