Luma Payroll Gym
← Heatmap / GPT 5.6 Luna · Task 22
GPT 5.6 Luna* · Single-turn · Task 22 (Calculation, at the wage cap) Mean 100.0%
Field Expected Rollout #1 (100%) Rollout #2 (100%) Rollout #3 (100%)
decision calculate calculate calculate calculate
currency LCR LCR LCR LCR
gross pay 4499.98 4499.98 4499.98 4499.98
employee contribution 270.00 270.00 270.00 270.00
allowed deduction 93.05 93.05 93.05 93.05
taxable pay 4136.93 4136.93 4136.93 4136.93
income tax 371.39 371.39 371.39 371.39
net pay 3765.54 3765.54 3765.54 3765.54
clauses R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6
Prompt
Process this monthly payroll record under the supplied rulebook. Return the R6 or R7 JSON answer.
Source documents: {"b3c7b35caa7886e2-payroll": {"kind": "payroll", "record": {"gross_pay": "4499.98", "payroll_month": "2026-04", "allowed_deduction": "93.05"}}}
Authoritative case reference schedule: {"first-half": {"rate": "0.06", "cap": "4500.00", "deduction": "400.00", "free": "1200.00", "upper": "3000.00", "middle_rate": "0.08", "upper_rate": "0.20"}, "second-half": {"rate": "0.06", "cap": "4500.00", "deduction": "400.00", "free": "1100.00", "upper": "3000.00", "middle_rate": "0.12", "upper_rate": "0.24"}}
Rollouts
Rollout #1 100.0% passed · 3.7s · $0.0004
ComponentScoreClauses
decision 100.0% R1 R2 R3 R4 R5 R6
exact 100.0% R1 R2 R3 R4 R5 R6
field accuracy 100.0% R1 R2 R3 R4 R5 R6
citations 100.0% R1 R2 R3 R4 R5 R6
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "4499.98",
  "employee_contribution": "270.00",
  "allowed_deduction": "93.05",
  "taxable_pay": "4136.93",
  "income_tax": "371.39",
  "net_pay": "3765.54",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
**Calculating contributions and taxes**

I'm working on a custom calculation for the first half of the month. With a gross amount of 4499.98, I find the contribution to be about 270.00 after applying the rate. There’s a deduction of 93.05, keeping it valid since it’s under 400. After these adjustments, the taxable income is 4136.93. The tax breakdown shows a total of approximately 371.39, leading to a net amount of 3765.54. I’ll ensure all fields are exact.
Rollout #2 100.0% passed · 3.2s · $0.0004
ComponentScoreClauses
decision 100.0% R1 R2 R3 R4 R5 R6
exact 100.0% R1 R2 R3 R4 R5 R6
field accuracy 100.0% R1 R2 R3 R4 R5 R6
citations 100.0% R1 R2 R3 R4 R5 R6
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "4499.98",
  "employee_contribution": "270.00",
  "allowed_deduction": "93.05",
  "taxable_pay": "4136.93",
  "income_tax": "371.39",
  "net_pay": "3765.54",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Rollout #3 100.0% passed · 3.1s · $0.0003
ComponentScoreClauses
decision 100.0% R1 R2 R3 R4 R5 R6
exact 100.0% R1 R2 R3 R4 R5 R6
field accuracy 100.0% R1 R2 R3 R4 R5 R6
citations 100.0% R1 R2 R3 R4 R5 R6
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "4499.98",
  "employee_contribution": "270.00",
  "allowed_deduction": "93.05",
  "taxable_pay": "4136.93",
  "income_tax": "371.39",
  "net_pay": "3765.54",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}