Luma Payroll Gym
Rules Report
← Heatmap / Gemini 3.1 Flash Lite · Task 64
Gemini 3.1 Flash Lite · Tool use · Task 64 (Traps, conflicting pay (future amendment)) Mean -1.1%
Field Expected Rollout #1 (97%) Rollout #2 (-50%) Rollout #3 (-50%)
decision clarify clarify calculate calculate
currency LCR LCR
gross pay 6900.86 6900.86
employee contribution 320.00 320.00
allowed deduction 338.48 338.48
taxable pay 6242.38 6242.38
income tax 946.17 946.17
net pay 5296.21 5296.21
reason code CONFLICTING_GROSS_PAY CONFLICTING_GROSS_PAY
clauses R7 R9 R7 R9 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 96.7% passed · 6 tool calls · 10.2s · $0.0047
ComponentScoreClauses
decision 100.0% R7 R9
exact 100.0% R7 R9
field accuracy 100.0% R7 R9
citations 100.0% R7 R9
explanation 66.7% R7 R9
Assistant
list_documents()
Tool
[
  {"id": "69589218e6f47d77-payroll", "kind": "payroll"},
  {"id": "69589218e6f47d77-contract", "kind": "contract"},
  {"id": "69589218e6f47d77-amendment", "kind": "amendment"}
]
Assistant
read_document(document_id="69589218e6f47d77-payroll")
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "6900.86", "payroll_month": "2026-11", "allowed_deduction": "338.48"}
}
Assistant
read_document(document_id="69589218e6f47d77-contract")
Tool
{
  "kind": "contract",
  "gross_pay": "7000.86"
}
Assistant
read_document(document_id="69589218e6f47d77-amendment")
Tool
{
  "kind": "amendment",
  "gross_pay": "6900.86",
  "approved": true,
  "effective_month": "2026-12"
}
Assistant
lookup_reference(reference="second-half")
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.10",
  "upper_rate": "0.24"
}
Assistant
calculate(program="employee_contribution = round(min(6900.86, 4000.00) * 0.08, 2)\ntaxable_pay = 6900.86 - employee_contribution - 338.48\ntax_bracket_1 = max(0, min(taxable_pay, 3300.00) - 900.00)\ntax_bracket_2 = max(0, taxable_pay - 3300.00)\nincome_tax = round(tax_bracket_1 * 0.10 + tax_bracket_2 * 0.24, 2)\nnet_pay = 6900.86 - employee_contribution - 338.48 - income_tax")
Tool
{
  "results": {"employee_contribution": "320.00", "taxable_pay": "6242.38", "tax_bracket_1": "2400.00", "tax_bracket_2": "2942.38", "income_tax": "946.17", "net_pay": "5296.21"}
}
Assistant
{
  "decision": "clarify",
  "reason_code": "CONFLICTING_GROSS_PAY",
  "clauses": ["R7", "R9"],
  "explanation": "The payroll record's gross_pay (6900.86) conflicts with the contract gross_pay (7000.86). The amendment is not applicable as its effective_month (2026-12) is later than the payroll_month (2026-11)."
}
Rollout #2 -50.0% answered trap · 6 tool calls · 8.1s · $0.0046
ComponentScoreClauses
decision 0.0% R7 R9
exact 0.0% R7 R9
field accuracy 0.0% R7 R9
citations 0.0% R7 R9
Assistant
list_documents()
Tool
[
  {"id": "69589218e6f47d77-payroll", "kind": "payroll"},
  {"id": "69589218e6f47d77-contract", "kind": "contract"},
  {"id": "69589218e6f47d77-amendment", "kind": "amendment"}
]
Assistant
read_document(document_id="69589218e6f47d77-payroll")
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "6900.86", "payroll_month": "2026-11", "allowed_deduction": "338.48"}
}
Assistant
read_document(document_id="69589218e6f47d77-contract")
Tool
{
  "kind": "contract",
  "gross_pay": "7000.86"
}
Assistant
read_document(document_id="69589218e6f47d77-amendment")
Tool
{
  "kind": "amendment",
  "gross_pay": "6900.86",
  "approved": true,
  "effective_month": "2026-12"
}
Assistant
lookup_reference(reference="second-half")
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.10",
  "upper_rate": "0.24"
}
Assistant
calculate(program="employee_contribution = round(min(6900.86, 4000.00) * 0.08, 2)\ntaxable_pay = 6900.86 - employee_contribution - 338.48\ntax_bracket1 = min(max(taxable_pay - 900.00, 0), 3300.00 - 900.00)\ntax_bracket2 = max(taxable_pay - 3300.00, 0)\nincome_tax = round(tax_bracket1 * 0.10 + tax_bracket2 * 0.24, 2)\nnet_pay = 6900.86 - employee_contribution - 338.48 - income_tax")
Tool
{
  "results": {"employee_contribution": "320.00", "taxable_pay": "6242.38", "tax_bracket1": "2400.00", "tax_bracket2": "2942.38", "income_tax": "946.17", "net_pay": "5296.21"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "6900.86",
  "employee_contribution": "320.00",
  "allowed_deduction": "338.48",
  "taxable_pay": "6242.38",
  "income_tax": "946.17",
  "net_pay": "5296.21",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}
Rollout #3 -50.0% answered trap · 6 tool calls · 7.5s · $0.0047
ComponentScoreClauses
decision 0.0% R7 R9
exact 0.0% R7 R9
field accuracy 0.0% R7 R9
citations 0.0% R7 R9
Assistant
list_documents()
Tool
[
  {"id": "69589218e6f47d77-payroll", "kind": "payroll"},
  {"id": "69589218e6f47d77-contract", "kind": "contract"},
  {"id": "69589218e6f47d77-amendment", "kind": "amendment"}
]
Assistant
read_document(document_id="69589218e6f47d77-payroll")
Tool
{
  "kind": "payroll",
  "record": {"gross_pay": "6900.86", "payroll_month": "2026-11", "allowed_deduction": "338.48"}
}
Assistant
read_document(document_id="69589218e6f47d77-contract")
Tool
{
  "kind": "contract",
  "gross_pay": "7000.86"
}
Assistant
read_document(document_id="69589218e6f47d77-amendment")
Tool
{
  "kind": "amendment",
  "gross_pay": "6900.86",
  "approved": true,
  "effective_month": "2026-12"
}
Assistant
lookup_reference(reference="second-half")
Tool
{
  "reference": "second-half",
  "months": ["2026-07", "2026-12"],
  "rate": "0.08",
  "cap": "4000.00",
  "deduction": "400.00",
  "free": "900.00",
  "upper": "3300.00",
  "middle_rate": "0.10",
  "upper_rate": "0.24"
}
Assistant
calculate(program="employee_contribution = round(min(6900.86, 4000.00) * 0.08, 2)\ntaxable_pay = 6900.86 - employee_contribution - 338.48\ntax_bracket1 = min(taxable_pay, 900.00) * 0.00\ntax_bracket2 = min(max(0, taxable_pay - 900.00), 3300.00 - 900.00) * 0.10\ntax_bracket3 = max(0, taxable_pay - 3300.00) * 0.24\nincome_tax = round(tax_bracket1 + tax_bracket2 + tax_bracket3, 2)\nnet_pay = 6900.86 - employee_contribution - 338.48 - income_tax")
Tool
{
  "results": {"employee_contribution": "320.00", "taxable_pay": "6242.38", "tax_bracket1": "0.0000", "tax_bracket2": "240.0000", "tax_bracket3": "706.1712", "income_tax": "946.17", "net_pay": "5296.21"}
}
Assistant
{
  "decision": "calculate",
  "currency": "LCR",
  "gross_pay": "6900.86",
  "employee_contribution": "320.00",
  "allowed_deduction": "338.48",
  "taxable_pay": "6242.38",
  "income_tax": "946.17",
  "net_pay": "5296.21",
  "clauses": ["R1", "R2", "R3", "R4", "R5", "R6"]
}