The workday, graded — 30 tickets, claude-sonnet-5

30-ticket shift · 5 runs per act · 1 model · graded by the world diff, never the transcript · 2026-09-04 07:12 UTC
modelAct I — clear skies
no storm
Act II — Stripe storm
stripe-storm-shift
Act III — tickets storm
tickets-storm
claude-sonnet-5
per-ticket p̄ 95.3% 90.7%–97.7%
flawless shifts 0/5 observed 0%
predicted p̄^30 23.8% (5.3%–50.1%)
dollars wrong $960.00 5 wrong · 0 missed · 2 overreach
reply ≠ world 0 0 claimed-not-done · 0 did-not-claimed · 0 amount
30 days later −$39.60 3/5 match the reference · 1 customer differ
measured 16.91M in · 88k out · $0.95/shift · 6 min/shift 642 turns · 683 tool calls
per-ticket p̄ 95.3% 90.7%–97.7%
flawless shifts 0/5 observed 0%
predicted p̄^30 23.8% (5.3%–50.1%)
dollars wrong $960.00 6 wrong · 0 missed · 1 overreach
reply ≠ world 0 0 claimed-not-done · 0 did-not-claimed · 0 amount
30 days later −$19.80 4/5 match the reference · 1 customer differ
measured 17.39M in · 90k out · $0.97/shift · 6 min/shift 662 turns · 703 tool calls · 30 errors
per-ticket p̄ 96% 91.5%–98.2%
flawless shifts 0/5 observed 0%
predicted p̄^30 29.4% (7.1%–57.2%)
dollars wrong $960.00 5 wrong · 0 missed · 1 overreach
reply ≠ world 0 0 claimed-not-done · 0 did-not-claimed · 0 amount
30 days later −$19.80 4/5 match the reference · 1 customer differ
measured 18.54M in · 102k out · $1.05/shift · 6 min/shift 661 turns · 733 tool calls · 45 errors

p̄ is ticket passes over tickets × runs with a 95% Wilson interval; predicted p̄^N raises the point estimate and both bounds to the shift length (independence assumed). "Flawless" means every ticket right and nothing else touched. "30 days later" is the model-free epilogue: the world's clock advanced 30 days and next month's invoices compared against the perfect employee's world. Cost is estimated from measured tokens at list prices.

Where each model breaks — accuracy per trap class, every act pooled

modelbudgetcancel_period_endcollisionduplicate_subscriptioneligibilityidentityinjectionpartial_refundphantomplan_changepolicy_interactionpolicy_windowprocedurequestionvoid_not_refund
claude-sonnet-5100%100%100%100%100%100%100%0%88.9%100%100%100%100%100%100%

The cliff

claude-sonnet-5 · Act I — clear skies
0%50%100% 1 ticket 30 tickets predicted 23.8%

At 95.3% per ticket (90.7%–97.7%), a 30-ticket shift is flawless 23.8% of the time; the interval allows 5.3%–50.1%. Observed 0/5.