Luma Payroll Gym
← Heatmap / MiMo V2.6 Pro · Task 31
MiMo V2.6 Pro · Tool use · Task 31 (Calculation, upper 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 3941.14 3941.14 3941.14 3941.14
employee contribution 197.06 197.06 197.06 197.06
allowed deduction 197.94 197.94 197.94 197.94
taxable pay 3546.14 3546.14 3546.14 3546.14
income tax 390.15 390.15 390.15 390.15
net pay 3155.99 3155.99 3155.99 3155.99
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 · 26.2s · $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 list documents first.
Tool
[
  {"id": "c0b4647b43710bd2-payroll", "kind": "payroll"},
  {"id": "c0b4647b43710bd2-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b4647b43710bd2-payroll")read_document(document_id="c0b4647b43710bd2-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "3941.14", "payroll_month": "2026-03", "allowed_deduction": "197.94"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "3941.14"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month 2026-03 → first-half reference (first-half presumably covers months 01-06). Gross pay 3941.14, contract matches. Allowed deduction 197.94, must not exceed deduction cap or gross minus contribution.

Lookup first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.05",
  "cap": "5000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.14",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(3941.14, 5000.00) * 0.05, 2)\ntaxable = 3941.14 - contribution - 197.94\nmiddle_part = min(max(taxable - 900.00, 0.00), 3300.00 - 900.00)\nupper_part = max(taxable - 3300.00, 0.00)\nincome_tax = round(middle_part * 0.14 + upper_part * 0.22, 2)\nnet_pay = 3941.14 - contribution - 197.94 - income_tax")
Reasoning
Compute:
- contribution = round(min(3941.14, 5000) * 0.05, 2) = round(197.057, 2) = 197.06
- allowed_deduction 197.94 ≤ 400 and ≤ 3941.14 - 197.06 = 3744.08. OK.
- taxable = 3941.14 - 197.06 - 197.94 = 3546.14
- tax: free 900 untaxed. 3546.14 - 900 = 2646.14; upper boundary 3300. Portion from 900 to 3300 = 2400 * 0.14 = 336.00. Portion above 3300 = 3546.14 - 3300 = 246.14 * 0.22 = 54.1508. Sum = 336 + 54.1508 = 390.1508 → round 390.15.
- net = 3941.14 - 197.06 - 197.94 - 390.15 = 3155.99

Let me verify with calculate.
Tool
{
  "results": {"contribution": "197.06", "taxable": "3546.14", "middle_part": "2400.00", "upper_part": "246.14", "income_tax": "390.15", "net_pay": "3155.99"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "3941.14",
  "employee_contribution": "197.06",
  "allowed_deduction": "197.94",
  "taxable_pay": "3546.14",
  "income_tax": "390.15",
  "net_pay": "3155.99",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
All checks pass. Contract matches gross pay — no conflict. Return JSON.
Rollout #2 100.0% passed · 5 tool calls · 30.4s · $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 me start by listing documents.
Tool
[
  {"id": "c0b4647b43710bd2-payroll", "kind": "payroll"},
  {"id": "c0b4647b43710bd2-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b4647b43710bd2-payroll")read_document(document_id="c0b4647b43710bd2-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "3941.14", "payroll_month": "2026-03", "allowed_deduction": "197.94"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "3941.14"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month is 2026-03, which is first-half (Jan-Jun). Gross pay 3941.14 matches contract 3941.14 — no conflict. Lookup first-half reference.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.05",
  "cap": "5000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.14",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(3941.14, 5000.00) * 0.05, 2)\ntaxable = 3941.14 - contribution - 197.94\ntax_raw = min(max(taxable - 900.00, 0.00), 3300.00 - 900.00) * 0.14 + max(taxable - 3300.00, 0.00) * 0.22\nincome_tax = round(tax_raw, 2)\nnet_pay = 3941.14 - contribution - 197.94 - income_tax")
Reasoning
Wait, months shown as ["2026-01", "2026-06"] presumably a range Jan–Jun. 2026-03 is in first-half. Good.

Compute:
- contribution = round(min(3941.14, 5000.00) * 0.05, 2) = round(197.057, 2) = 197.06
- allowed_deduction = 197.94, cap 400.00, and must not exceed gross - contribution = 3941.14 - 197.06 = 3744.08. OK.
- taxable = 3941.14 - 197.06 - 197.94 = 3546.14
- tax: free 900 untaxed. Middle portion: 3300 - 900 = 2400 at 0.14 = 336.00. Upper portion: 3546.14 - 3300 = 246.14 at 0.22 = 54.1508. Sum = 390.1508 → round 390.15 (do not round intermediate products separately).
- net = 3941.14 - 197.06 - 197.94 - 390.15 = 3155.99

Use calculate to verify.
Tool
{
  "results": {"contribution": "197.06", "taxable": "3546.14", "tax_raw": "390.1508", "income_tax": "390.15", "net_pay": "3155.99"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "3941.14",
  "employee_contribution": "197.06",
  "allowed_deduction": "197.94",
  "taxable_pay": "3546.14",
  "income_tax": "390.15",
  "net_pay": "3155.99",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
All checks pass. Return JSON with clauses R1–R6.
Rollout #3 100.0% passed · 6 tool calls · 63.8s · $0.0018
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": "c0b4647b43710bd2-payroll", "kind": "payroll"},
  {"id": "c0b4647b43710bd2-contract", "kind": "contract"}
]
Assistant
read_document(document_id="c0b4647b43710bd2-payroll")read_document(document_id="c0b4647b43710bd2-contract")
Reasoning
Read both documents.
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "3941.14", "payroll_month": "2026-03", "allowed_deduction": "197.94"}
}
Tool
{
  "kind": "contract",
  "gross_pay": "3941.14"
}
Assistant
lookup_reference(reference="first-half")
Reasoning
Payroll month 2026-03 → first-half reference. Contract gross pay matches payroll gross pay (3941.14 = 3941.14), so no conflict. Lookup first-half.
Tool
{
  "reference": "first-half",
  "months": ["2026-01", "2026-06"],
  "rate": "0.05",
  "cap": "5000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.14",
  "upper_rate": "0.22"
}
Assistant
calculate(program="contribution = round(min(3941.14, 5000.00) * 0.05, 2)\ntaxable = 3941.14 - contribution - 197.94\nmiddle_part = round((min(taxable, 3300.00) - 900.00) * 0.14, 10)\nupper_part = round(max(taxable - 3300.00, 0.00) * 0.22, 10)\nincome_tax = round(middle_part + upper_part, 2)\nnet = 3941.14 - contribution - 197.94 - income_tax")
Reasoning
Gross pay 3941.14, cap 5000. Contribution = round(min(3941.14, 5000) * 0.05, 2) = round(197.057, 2) = 197.06.

Allowed deduction 197.94 ≤ deduction cap 400.00. Check available-pay: gross - contribution = 3941.14 - 197.06 = 3744.08 ≥ 197.94. OK.

Taxable pay = 3941.14 - 197.06 - 197.94 = 3546.14.

Tax: free 900, upper 3300. Middle portion: 3300 - 900 = 2400 taxed at 0.14 → 336.00. Upper portion: 3546.14 - 3300 = 246.14 at 0.22 → 54.1508. Total = 336.00 + 54.1508 = 390.1508 → round 390.15.

Net pay = 3941.14 - 197.06 - 197.94 - 390.15 = 3156. Let's compute: 3941.14 - 197.06 = 3744.08; - 197.94 = 3546.14; - 390.15 = 3155.99.

Use calculate to verify.
Tool
{
  "error": "round needs a whole number of digits from 0 to 4"
}
Assistant
calculate(program="contribution = round(min(3941.14, 5000.00) * 0.05, 2)\ntaxable = 3941.14 - contribution - 197.94\nmiddle_part = (min(taxable, 3300.00) - 900.00) * 0.14\nupper_part = max(taxable - 3300.00, 0.00) * 0.22\nincome_tax = round(middle_part + upper_part, 2)\nnet = 3941.14 - contribution - 197.94 - income_tax")
Reasoning
round(x, 10) not allowed. Use non-rounded products; just compute directly since calculator is exact decimal.
Tool
{
  "results": {"contribution": "197.06", "taxable": "3546.14", "middle_part": "336.0000", "upper_part": "54.1508", "income_tax": "390.15", "net": "3155.99"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "3941.14",
  "employee_contribution": "197.06",
  "allowed_deduction": "197.94",
  "taxable_pay": "3546.14",
  "income_tax": "390.15",
  "net_pay": "3155.99",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Reasoning
All values confirmed. Contract matches, no amendment needed. Clauses: R1, R2, R3, R4, R5, R6.