Release regression checks
Diff the last known-good window against the new deploy to see whether model mix, retry volume, or routing changed spend.
Cost Compare
Paste two trace windows to see which model, provider, or release actually moved spend.
Compare two trace windows
Paste a baseline and a changed window to see which model line moved. Parsing stays in your browser tab, and the diff updates live as soon as both windows are valid.
- 1Paste the baseline trace window into Period A.
- 2Paste the changed trace window into Period B.
- 3Export the model delta once the cause is obvious.
Period A
Use the baseline window you trust today so the delta reads against a stable starting point.
Period B
Paste the changed window here to isolate the release, routing, or workload shift that moved spend.
Comparison updates live as you paste or type into both fields.
Live Preview
Live preview
Add valid input to populate this result panel.
Paste Period A and Period B trace JSON or NDJSON above to compare model-level cost deltas.
Diff the bill
Spot the model line that changed before the invoice lands
Compare is the fastest route from the bill moving to a concrete model delta. Use it when a deploy, provider route, or tenant burst changed cost and you need a clear before-and-after readout before the RCA.
Bring the baseline window that finance already trusts.
Isolate the exact model deltas instead of debating the total invoice in aggregate.
Export the diff as soon as the spike is visible, then save the baseline only if the same question keeps coming back.
Use cases
Three moments this compare view earns its keep
Use compare when a release check, routing change, or incident review needs a before-and-after readout that finance and engineering can discuss from the same numbers.
Provider and model swaps
Compare before and after a routing change when you need one table that shows which model line actually moved.
Incident follow-up
Bring two trace exports to the RCA and leave with a model-level delta that finance and engineering can read the same way.
FAQ
Questions teams ask before they trust a spend diff
The free route gives you a live model delta now; saved comparisons come later if the same check becomes a weekly habit.
Catch the next spike before it lands in the invoice
Pro runs scheduled diffs against a rolling baseline and alerts your team.
Create free account →Like what you see? Get early access to the full Auditor
Join the waitlist to save audit sessions and turn trace data into attribution reports.