Independent instrumentation :: not affiliated with Anthropic
The same battery of tasks, the same request shape, every day at 07:30 Eastern. When the answers change, the trace moves. When the trace moves, you hear about it.
| Model | Today | vs previous |
|---|---|---|
| haiku-4-5 | 11/12 | first reading |
| sonnet-5 | 12/12 | first reading |
| opus-5 | 12/12 | first reading |
Claude 5 models no longer accept temperature control, so some day-to-day movement is sampling variance, not drift. Separating the two is the point of measuring daily. Method.
The house service: paste your Anthropic Console usage export and Winthrop itemizes your Claude spend against the current rate card, then identifies what you are overpaying for. Caching, tiering, batch. Pure arithmetic, no model ever sees your data. Free summary; full report $19.
The trace, in your inbox, only when it moves. No schedule, no digest padding. Only deviation.