Luma Payroll Gym
Rules Report
← Heatmap / MiMo V2.6 Pro · Task 75
MiMo V2.6 Pro · Tool use · Task 75 (Calculation, half-cent rounding tie) 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 2107.50 2107.50 2107.50 2107.50
employee contribution 147.53 147.53 147.53 147.53
allowed deduction 273.91 273.91 273.91 273.91
taxable pay 1686.06 1686.06 1686.06 1686.06
income tax 54.88 54.88 54.88 54.88
net pay 1631.18 1631.18 1631.18 1631.18
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.
Retrieve the case inputs with list_documents and read_document. Reference rows are available only through lookup_reference. Use calculate for exact decimal arithmetic.
Rollouts
Rollout #1 100.0% passed · 4 tool calls · 15.8s · $0.0014
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
list_documents()
Reasoning 
Let me start by listing documents.
Tool
[
  {"id": "9c34fc341666103e-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="9c34fc341666103e-payroll")
Reasoning 
Read the payroll document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "2107.50", "payroll_month": "2026-04", "allowed_deduction": "273.91"}
}
Assistant
lookup_reference(reference="first-half")
Reasoning 
Payroll month 2026-04 → first-half reference (Jan-Jun). Lookup first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.07",
  "cap": "4500.00",
  "deduction": "400.00",
  "free": "1000.00",
  "upper": "3600.00",
  "middle_rate": "0.08",
  "upper_rate": "0.24"
}
Assistant
calculate(program="contribution = round(min(2107.50, 4500.00) * 0.07, 2)\nallowed = min(273.91, 400.00, 2107.50 - contribution)\ntaxable = 2107.50 - contribution - allowed\nmiddle_portion = min(max(taxable - 1000.00, 0.00), 3600.00 - 1000.00)\nupper_portion = max(taxable - 3600.00, 0.00)\nincome_tax = round(middle_portion * 0.08 + upper_portion * 0.24, 2)\nnet_pay = 2107.50 - contribution - allowed - income_tax")
Reasoning 
Compute:
- gross = 2107.50
- contribution = round(min(2107.50, 4500) * 0.07, 2) = round(147.525, 2) = 147.53 (half up)
- allowed deduction 273.91 ≤ 400 cap, and ≤ gross - contribution = 2107.50 - 147.53 = 1959.97. OK.
- taxable = 2107.50 - 147.53 - 273.91 = 1686.06
- tax: free 1000, upper 3600. taxable 1686.06: first 1000 untaxed; 686.06 at 0.08 = 54.8848. Total tax = round(54.8848, 2) = 54.88 (half up: 54.8848 → 54.88).
- net = 2107.50 - 147.53 - 273.91 - 54.88 = 1631.18

Check net: 2107.50 - 147.53 = 1959.97; -273.91 = 1686.06; -54.88 = 1631.18. Good.

Clauses: R1-R6. No amendment. Answer fields per R6.
Tool
{
  "results": {"contribution": "147.53", "allowed": "273.91", "taxable": "1686.06", "middle_portion": "686.06", "upper_portion": "0.00", "income_tax": "54.88", "net_pay": "1631.18"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "2107.50",
  "employee_contribution": "147.53",
  "allowed_deduction": "273.91",
  "taxable_pay": "1686.06",
  "income_tax": "54.88",
  "net_pay": "1631.18",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
Return the JSON.
Rollout #2 100.0% passed · 4 tool calls · 15.6s · $0.0014
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
list_documents()
Reasoning 
Let me list documents first.
Tool
[
  {"id": "9c34fc341666103e-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="9c34fc341666103e-payroll")
Reasoning 
Read the payroll document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "2107.50", "payroll_month": "2026-04", "allowed_deduction": "273.91"}
}
Assistant
lookup_reference(reference="first-half")
Reasoning 
Payroll month 2026-04 → first-half (assume first-half covers months 01-06, second-half 07-12). Let me lookup reference first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.07",
  "cap": "4500.00",
  "deduction": "400.00",
  "free": "1000.00",
  "upper": "3600.00",
  "middle_rate": "0.08",
  "upper_rate": "0.24"
}
Assistant
calculate(program="contribution = round(min(2107.50, 4500.00) * 0.07, 2)\ntaxable = 2107.50 - contribution - 273.91\ntax = round(max(0.00, min(taxable, 3600.00) - 1000.00) * 0.08 + max(0.00, taxable - 3600.00) * 0.24, 2)\nnet = 2107.50 - contribution - 273.91 - tax")
Reasoning 
gross_pay = 2107.50, month 2026-04 → first-half row applies. rate 0.07, cap 4500.00, deduction cap 400.00, free 1000.00, upper 3600.00, middle 0.08, upper_rate 0.24.

employee_contribution = round(min(2107.50, 4500.00) * 0.07, 2) = round(147.525, 2) = 147.53 (half up).

allowed_deduction 273.91 ≤ 400.00 cap; check ≤ gross - contribution = 2107.50 - 147.53 = 1959.97. OK.

taxable_pay = 2107.50 - 147.53 - 273.91 = 1686.06.

income tax: 1686.06 ≤ 3600, above free 1000:686.06 * 0.08 = 54.8848 → round 54.88? Round total: 54.8848 → 54.88.

net_pay = 2107.50 - 147.53 - 273.91 - 54.88 = 1631.18.

Calculate to verify.
Tool
{
  "results": {"contribution": "147.53", "taxable": "1686.06", "tax": "54.88", "net": "1631.18"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "2107.50",
  "employee_contribution": "147.53",
  "allowed_deduction": "273.91",
  "taxable_pay": "1686.06",
  "income_tax": "54.88",
  "net_pay": "1631.18",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
All values confirmed. Clauses: R1 (row selection), R2 (rounding), R3 (contribution), R4 (deduction/taxable), R5 (tax), R6 (answer format). No amendment needed.
Rollout #3 100.0% passed · 5 tool calls · 16.9s · $0.0014
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
list_documents()
Reasoning 
Let me list documents first.
Tool
[
  {"id": "9c34fc341666103e-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="9c34fc341666103e-payroll")
Reasoning 
Read the document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "2107.50", "payroll_month": "2026-04", "allowed_deduction": "273.91"}
}
Assistant
lookup_reference(reference="first-half")lookup_reference(reference="second-half")
Reasoning 
Payroll month 2026-04 → second-half? Wait, first-half vs second-half likely means first half of year (Jan-Jun) vs second half (Jul-Dec). 2026-04 is first half. Let me look up reference "first-half".
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.07",
  "cap": "4500.00",
  "deduction": "400.00",
  "free": "1000.00",
  "upper": "3600.00",
  "middle_rate": "0.08",
  "upper_rate": "0.24"
}
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.04",
  "cap": "5000.00",
  "deduction": "400.00",
  "free": "1100.00",
  "upper": "3600.00",
  "middle_rate": "0.10",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(2107.50, 4500.00) * 0.07, 2)\ntaxable = 2107.50 - contribution - 273.91\nmiddle_portion = max(0.00, min(taxable, 3600.00) - 1000.00)\nupper_portion = max(0.00, taxable - 3600.00)\nincome_tax = round(middle_portion * 0.08 + upper_portion * 0.24, 2)\nnet_pay = 2107.50 - contribution - 273.91 - income_tax")
Reasoning 
2026-04 falls in first-half. Rate 0.07, cap 4500, deduction cap 400, free 1000, upper 3600, middle 0.08, upper rate 0.24.

Gross 2107.50. Contribution = round(min(2107.50, 4500)*0.07, 2) = round(147.525, 2) = 147.53 (half up).

Allowed deduction 273.91 ≤ 400 and ≤ 2107.50 - 147.53 = 1959.97. OK.

Taxable = 2107.50 - 147.53 - 273.91 = 1686.06.

Tax: free 1000 untaxed. Middle portion = 1686.06 - 1000 = 686.06 up to 3600. Tax = 686.06*0.08 = 54.8848 → 54.88? Round half up to cent: 54.8848 → 54.88. Total tax = 54.88.

Net = 2107.50 - 147.53 - 273.91 - 54.88 = 1631.18.

Let me verify with calculate.
Tool
{
  "results": {"contribution": "147.53", "taxable": "1686.06", "middle_portion": "686.06", "upper_portion": "0.00", "income_tax": "54.88", "net_pay": "1631.18"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "2107.50",
  "employee_contribution": "147.53",
  "allowed_deduction": "273.91",
  "taxable_pay": "1686.06",
  "income_tax": "54.88",
  "net_pay": "1631.18",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
All good. Return JSON.