Luma Payroll Gym
← Heatmap / MiMo V2.6 Pro · Task 17
MiMo V2.6 Pro · Tool use · Task 17 (Calculation, at the tax-free line) 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 1430.25 1430.25 1430.25 1430.25
employee contribution 114.42 114.42 114.42 114.42
allowed deduction 115.82 115.82 115.82 115.82
taxable pay 1200.01 1200.01 1200.01 1200.01
income tax 0.00 0.00 0.00 0.00
net pay 1200.01 1200.01 1200.01 1200.01
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 · 24.9s · $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 list documents first.
Tool
[
  {"id": "c0b6cf337e756b28-payroll", "kind": "payroll"},
  {"id": "c0b6cf337e756b28-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b6cf337e756b28-payroll")read_document(document_id="c0b6cf337e756b28-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1430.25", "payroll_month": "2026-03", "allowed_deduction": "115.82"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "1430.25"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month 2026-03 → first-half reference. Contract gross matches payroll gross, so no conflict. Lookup first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.14",
  "upper_rate": "0.18"
}
Assistant
calculate(program="contribution = round(min(1430.25, 4000.00) * 0.08, 2)\nallowed = min(115.82, 400.00, 1430.25 - contribution)\ntaxable = 1430.25 - contribution - allowed\ntax = round((min(taxable, 3000.00) - 1200.00) * 0.14 + max(taxable - 3000.00, 0) * 0.18, 2)\nnet = 1430.25 - contribution - allowed - tax")
Reasoning
Gross pay 1430.25, contribution = min(1430.25, 4000) * 0.08 = 114.42.

Allowed deduction 115.82. Cap 400. Gross - contribution = 1430.25 - 114.42 = 1315.83. 115.82 ≤ 1315.83 and ≤ 400. OK.

Taxable = 1430.25 - 114.42 - 115.82 = 1200.01.

Tax: free 1200. Taxable 1200.01 → 0.01 above free, up to 3000 at 0.14 → 0.0014, rounds to 0.00.

Net = 1430.25 - 114.42 - 115.82 - 0.00 = 1200.01.

Let me verify with calculate.
Tool
{
  "results": {"contribution": "114.42", "allowed": "115.82", "taxable": "1200.01", "tax": "0.00", "net": "1200.01"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1430.25",
  "employee_contribution": "114.42",
  "allowed_deduction": "115.82",
  "taxable_pay": "1200.01",
  "income_tax": "0.00",
  "net_pay": "1200.01",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
Tax: taxable 1200.01, free 1200, so taxable above free = 0.01, taxed at 0.14 = 0.0014 → rounds to 0.00. Correct.
Rollout #2 100.0% passed · 5 tool calls · 25.2s · $0.0015
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's start by listing documents.
Tool
[
  {"id": "c0b6cf337e756b28-payroll", "kind": "payroll"},
  {"id": "c0b6cf337e756b28-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b6cf337e756b28-payroll")read_document(document_id="c0b6cf337e756b28-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1430.25", "payroll_month": "2026-03", "allowed_deduction": "115.82"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "1430.25"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month 2026-03, gross pay 1430.25, contract gross pay matches (1430.25). No conflict. Allowed deduction 115.82.

March 2026 is in the first half of the year (Jan–Jun), so lookup first-half reference.

Note R1: "When showing old and current rows together, only the row covering the payroll month applies." Lookup reference first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.14",
  "upper_rate": "0.18"
}
Assistant
calculate(program="contribution = round(min(1430.25, 4000.00) * 0.08, 2)\ntaxable_pay = 1430.25 - contribution - 115.82\nbracket = taxable_pay - 1200.00\nmiddle_part = max(0.00, min(taxable_pay, 3000.00) - 1200.00)\nupper_part = max(0.00, taxable_pay - 3000.00)\nincome_tax = round(middle_part * 0.14 + upper_part * 0.18, 2)\nnet_pay = 1430.25 - contribution - 115.82 - income_tax")
Reasoning
First-half row covers 2026-01 through 2026-06 (inclusive). March 2026 applies.

Rate: 0.08, cap: 4000.00, deduction cap: 400.00, free: 1200.00, upper: 3000.00, middle_rate: 0.14, upper_rate: 0.18.

Contribution = 0.08 * min(1430.25, 4000.00) = 0.08 * 1430.25 = 114.42.

Allowed deduction 115.82 ≤ 400.00 ✓. Also ≤ gross - contribution = 1430.25 - 114.42 = 1315.83 ✓.

Taxable pay = 1430.25 - 114.42 - 115.82 = 1200.01.

Income tax: free 1200.00. Taxable 1200.01, portion above free up to upper (3000) = 0.01 at 0.14 = 0.0014. Round total to 2 decimals half up → 0.00.

Net pay = 1430.25 - 114.42 - 115.82 - 0.00 = 1200.01.

Let me verify with calculate.
Tool
{
  "results": {"contribution": "114.42", "taxable_pay": "1200.01", "bracket": "0.01", "middle_part": "0.01", "upper_part": "0.00", "income_tax": "0.00", "net_pay": "1200.01"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1430.25",
  "employee_contribution": "114.42",
  "allowed_deduction": "115.82",
  "taxable_pay": "1200.01",
  "income_tax": "0.00",
  "net_pay": "1200.01",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
All checks pass. Contract matches gross pay, no amendment needed. Return calculated answer citing R1-R6.
Rollout #3 100.0% passed · 5 tool calls · 27.8s · $0.0013
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": "c0b6cf337e756b28-payroll", "kind": "payroll"},
  {"id": "c0b6cf337e756b28-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b6cf337e756b28-payroll")read_document(document_id="c0b6cf337e756b28-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "1430.25", "payroll_month": "2026-03", "allowed_deduction": "115.82"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "1430.25"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month 2026-03 → first-half row (months Jan–Jun presumably). Let me lookup first-half reference.

Contract gross pay matches payroll gross pay (1430.25), so no conflict. No amendment needed.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "1200.00",
  "upper": "3000.00",
  "middle_rate": "0.14",
  "upper_rate": "0.18"
}
Assistant
calculate(program="contribution = round(min(1430.25, 4000.00) * 0.08, 2)\ndeduction_check = min(115.82, 400.00, 1430.25 - contribution)\ntaxable = 1430.25 - contribution - deduction_check\nmiddle_portion = min(max(taxable - 1200.00, 0.00), 3000.00 - 1200.00)\nupper_portion = max(taxable - 3000.00, 0.00)\nincome_tax = round(middle_portion * 0.14 + upper_portion * 0.18, 2)\nnet_pay = 1430.25 - contribution - deduction_check - income_tax")
Reasoning
Gross pay 1430.25, cap 4000. Contribution = 1430.25 * 0.08 = 114.42.

Allowed deduction 115.82 ≤400.00 cap, and ≤ gross - contribution = 1430.25 - 114.42 = 1315.83. OK.

Taxable = 1430.25 - 114.42 - 115.82 = 1200.01.

Tax: free 1200. Taxable 1200.01 → above free by 0.01, up to upper 3000 → middle rate 0.14. Tax = 0.01 * 0.14 = 0.0014 → rounds to 0.00.

Net = 1430.25 - 114.42 - 115.82 - 0.00 = 1200.01.

Let me verify with calculate.
Tool
{
  "results": {"contribution": "114.42", "deduction_check": "115.82", "taxable": "1200.01", "middle_portion": "0.01", "upper_portion": "0.00", "income_tax": "0.00", "net_pay": "1200.01"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "1430.25",
  "employee_contribution": "114.42",
  "allowed_deduction": "115.82",
  "taxable_pay": "1200.01",
  "income_tax": "0.00",
  "net_pay": "1200.01",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
Contract gross pay matches payroll gross pay exactly, so no conflict and no amendment needed. R9 not needed in citations (amendment only cited when needed to resolve conflict). Calculated answers cite R1-R6.