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Evaluations

Scores per suite and model, from the last run of each. Re-running is a request to the eval service.

Pass rate, all suites91%+2 pts since 20 OctMeasured on 27 Oct
Cases run today8806 runs, 1 still running
Regressions2Needs a lookScore below the previous run
Eval cost today$4.12Measured by billing

Pass rate over the last eight days

All suites, daily
Pass rate

ratio · Source: eval service, nightly · As of: 2026-10-27T08:00:00Z

0%0%47%47%93%93%ratio, 20 Oct: 86% ratioratio, 21 Oct: 87% ratioratio, 22 Oct: 85% ratioratio, 23 Oct: 89% ratioratio, 24 Oct: 90% ratioratio, 25 Oct: 90% ratioratio, 26 Oct: 91% ratioratio, 27 Oct: 93% ratio20 Oct20 Oct21 Oct21 Oct22 Oct22 Oct23 Oct23 Oct24 Oct24 Oct25 Oct25 Oct26 Oct26 Oct27 Oct27 Oct

Failing cases

Support replies, Opus 5.5
Test results4 passed · 2 failed · 6 total
  • Refund within 14 days: approves and cites the policyPassed1800ms
  • Refund after 14 days: declines politelyPassed1650ms
  • Double charge: offers refund, never promises timingFailed2100ms

  • Unknown order number: asks for it oncePassed900ms
  • Angry tone: stays calm, no apology loopFailed2400ms

  • Gift card refund: routes to a personPassed1200ms

Latest runs

Evaluation runs
ChangeCasesState
Refund policyOpus 5.597%+2 pts78/80Complete
Refund policyHaiku 5.581%-5 pts65/80Complete
Support repliesOpus 5.593%+2 pts223/240Complete
Support repliesSonnet 5.588%-1 pts211/240Complete
Tool selectionOpus 5.590%±0108/120Running
Tool selectionSonnet 5.5——120/120Failed
1 selected · 1 on this pageSorted by Suite, ascending.

Opus 5.5 against Sonnet 5.5 on Support replies

Same 240 cases, same day

Compare runs

Opus 5.5 compared with Sonnet 5.5
FieldOpus 5.5Sonnet 5.5
GoalAnswer 240 support tickets the way the guide saysAnswer 240 support tickets the way the guide says
OutcomeSucceededPartly done
Duration7 min3 min
Cost$2.31$0.74
Not done17 cases failed29 cases failed