Luma Payroll Gym
← Heatmap / GPT 5.6 Luna · Task 92
GPT 5.6 Luna* · Single-turn · Task 92 (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 3999.99 3999.99 3999.99 3999.99
employee contribution 280.00 280.00 280.00 280.00
allowed deduction 391.99 391.99 391.99 391.99
taxable pay 3328.00 3328.00 3328.00 3328.00
income tax 324.16 324.16 324.16 324.16
net pay 3003.84 3003.84 3003.84 3003.84
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: {"96ed6aa66caaba7d-payroll": {"kind": "payroll", "record": {"gross_pay": "3999.99", "payroll_month": "2026-09", "allowed_deduction": "391.99"}}, "96ed6aa66caaba7d-contract": {"kind": "contract", "gross_pay": "3999.99"}}
Authoritative case reference schedule: {"first-half": {"rate": "0.05", "cap": "3500.00", "deduction": "400.00", "free": "1100.00", "upper": "3000.00", "middle_rate": "0.14", "upper_rate": "0.20"}, "second-half": {"rate": "0.07", "cap": "4000.00", "deduction": "400.00", "free": "1200.00", "upper": "3000.00", "middle_rate": "0.14", "upper_rate": "0.22"}}
Rollouts
Rollout #1 100.0% passed · 4.6s · $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": "3999.99",
  "employee_contribution": "280.00",
  "allowed_deduction": "391.99",
  "taxable_pay": "3328.00",
  "income_tax": "324.16",
  "net_pay": "3003.84",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
**Calculating contribution and tax**

I need to calculate various aspects for the second half of September. The rate is 0.07 and there's a cap of 4000 with deductions. For gross income of 3999.99, the minimum contribution cap is around 280. The taxable amount then is 3328.00. For tax, I assess contributions above the free amounts: 1800 at 0.14 and 328 at 0.22. This results in a total tax of 324.16. Finally, the net amount comes to 3003.84. I’ll specify any exact fields if needed.
Rollout #2 100.0% 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": "3999.99",
  "employee_contribution": "280.00",
  "allowed_deduction": "391.99",
  "taxable_pay": "3328.00",
  "income_tax": "324.16",
  "net_pay": "3003.84",
  "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": "3999.99",
  "employee_contribution": "280.00",
  "allowed_deduction": "391.99",
  "taxable_pay": "3328.00",
  "income_tax": "324.16",
  "net_pay": "3003.84",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}