Luma Payroll Gym
Rules Report
← Heatmap / MiMo V2.6 Pro · Task 10
MiMo V2.6 Pro · Tool use · Task 10 (Calculation, middle bracket) 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 1978.24 1978.24 1978.24 1978.24
employee contribution 79.13 79.13 79.13 79.13
allowed deduction 82.86 82.86 82.86 82.86
taxable pay 1816.25 1816.25 1816.25 1816.25
income tax 61.63 61.63 61.63 61.63
net pay 1754.62 1754.62 1754.62 1754.62
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 · 5 tool calls · 32.1s · $0.0017
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": "8d558bb0cabd2e37-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="8d558bb0cabd2e37-payroll")
Reasoning 
Read the payroll document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1978.24", "payroll_month": "2026-10", "allowed_deduction": "82.86"}
}
Assistant
lookup_reference(reference="first-half")lookup_reference(reference="second-half")
Reasoning 
Payroll month 2026-10 → second-half? Wait, "first-half" and "second-half" refer to halves of the year? Or the month? The reference rows have "effective months". Let me lookup both references to see effective months. The month is 2026-10, likely the second-half row covers Jul-Dec. Let me check.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.05",
  "cap": "4500.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "2800.00",
  "middle_rate": "0.10",
  "upper_rate": "0.18"
}
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.04",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.10",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(1978.24, 4000.00) * 0.04, 2)\ntaxable = 1978.24 - contribution - 82.86\ntax_raw = min(max(taxable - 1200.00, 0.00), 3000.00 - 1200.00) * 0.10 + max(taxable - 3000.00, 0.00) * 0.22\ntax = round(tax_raw, 2)\nnet = 1978.24 - contribution - 82.86 - tax")
Reasoning 
Payroll month 2026-10 falls in second-half (2026-07 through 2026-12). Use second-half row: rate 0.04, cap 4000.00, deduction cap 400.00, free 1200.00, upper 3000.00, middle_rate 0.10, upper_rate 0.22.

gross_pay = 1978.24
allowed_deduction = 82.86 (≤ 400.00, and ≤ gross - contribution)

employee_contribution = round(min(1978.24, 4000.00) * 0.04, 2) = round(79.1296, 2) = 79.13

Check allowed deduction: 82.86 ≤ 400.00 ✓; 82.86 ≤ 1978.24 - 79.13 = 1899.11 ✓

taxable_pay = 1978.24 - 79.13 - 82.86 = 1816.25

Income tax: taxable 1816.25 ≤ free 1200? No. Above free up to upper 3000: 1816.25 - 1200 = 616.25 at 0.10 = 61.625. Above upper:0. Total = 61.625 → round half up = 61.63? Wait, R2 says do not round intermediate bracket products separately before summing. Only one bracket here: 61.625 → round(61.625, 2) = 61.63 (half up).

net_pay = 1978.24 - 79.13 - 82.86 - 61.63 = 1754.62

Let me verify with calculate.
Tool
{
  "results": {"contribution": "79.13", "taxable": "1816.25", "tax_raw": "61.6250", "tax": "61.63", "net": "1754.62"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1978.24",
  "employee_contribution": "79.13",
  "allowed_deduction": "82.86",
  "taxable_pay": "1816.25",
  "income_tax": "61.63",
  "net_pay": "1754.62",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
All values confirmed. Return the R6 JSON.
Rollout #2 100.0% passed · 4 tool calls · 22.8s · $0.0012
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": "8d558bb0cabd2e37-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="8d558bb0cabd2e37-payroll")
Reasoning 
Read the payroll document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1978.24", "payroll_month": "2026-10", "allowed_deduction": "82.86"}
}
Assistant
lookup_reference(reference="second-half")
Reasoning 
Payroll month 2026-10 → second half of 2026. Look up reference.
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.04",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.10",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(1978.24, 4000.00) * 0.04, 2)\ntaxable = 1978.24 - contribution - 82.86\ntax = round((min(taxable, 3000.00) - 1200.00) * 0.10 + max(taxable - 3000.00, 0) * 0.22, 2)\nnet = 1978.24 - contribution - 82.86 - tax")
Reasoning 
Gross pay 1978.24, month 2026-10 (second half applies). Rate 0.04, cap 4000. Contribution = 0.04 * min(1978.24, 4000) = 0.04 * 1978.24 = 79.1296 → 79.13.

Allowed deduction 82.86, cap 400. Check: 82.86 ≤ min(400, 1978.24 - 79.13 = 1899.11) → OK.

Taxable = 1978.24 - 79.13 - 82.86 = 1816.25.
Tax: free 1200 untaxed. Portion above 1200 up to 3000: 1816.25 - 1200 = 616.25 * 0.10 = 61.625. Total tax rounded = 61.63 (round half up on total, but only one product here — 61.625 → 61.63).

Net = 1978.24 - 79.13 - 82.86 - 61.63 = 1754.62.

Calculate precisely.
Tool
{
  "results": {"contribution": "79.13", "taxable": "1816.25", "tax": "61.63", "net": "1754.62"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1978.24",
  "employee_contribution": "79.13",
  "allowed_deduction": "82.86",
  "taxable_pay": "1816.25",
  "income_tax": "61.63",
  "net_pay": "1754.62",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
All checks pass. Return the R6 answer.
Rollout #3 100.0% passed · 4 tool calls · 24.7s · $0.0012
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 the documents.
Tool
[
  {"id": "8d558bb0cabd2e37-payroll", "kind": "payroll"}
]
Assistant
read_document(document_id="8d558bb0cabd2e37-payroll")
Reasoning 
Read the payroll document.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1978.24", "payroll_month": "2026-10", "allowed_deduction": "82.86"}
}
Assistant
lookup_reference(reference="second-half")
Reasoning 
Payroll month 2026-10 is in the second half (July-December). Let me lookup the second-half reference.
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.04",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.10",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(1978.24, 4000.00) * 0.04, 2)\ntaxable = 1978.24 - contribution - 82.86\ntax = round((min(taxable, 3000.00) - 1200.00) * 0.10 + max(taxable - 3000.00, 0) * 0.22, 2)\nnet = 1978.24 - contribution - 82.86 - tax")
Reasoning 
Second-half row applies for 2026-10. rate 0.04, cap 4000, deduction cap 400, free 1200, upper 3000, middle_rate 0.10, upper_rate 0.22.

gross_pay = 1978.24
allowed_deduction = 82.86 (≤ 400, and ≤ gross - contribution)

Contribution = 0.04 * min(1978.24, 4000) = 0.04 * 1978.24 = 79.1296 → 79.13
Taxable = 1978.24 - 79.13 - 82.86 = 1816.25
Tax: free 1200 untaxed. Portion 1816.25 - 1200 = 616.25 up to upper 3000, at 0.10 = 61.625 → round total tax = 61.63 (round half up)
Net = 1978.24 - 79.13 - 82.86 - 61.63 = 1754.62

Check allowed_deduction ≤ gross - contribution: 82.86 ≤ 1978.24 - 79.13 = 1899.11. OK.

Let me verify with calculate.
Tool
{
  "results": {"contribution": "79.13", "taxable": "1816.25", "tax": "61.63", "net": "1754.62"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1978.24",
  "employee_contribution": "79.13",
  "allowed_deduction": "82.86",
  "taxable_pay": "1816.25",
  "income_tax": "61.63",
  "net_pay": "1754.62",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning 
All values confirmed. No amendment, no conflict. Return R6 answer citing R1-R6.