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Anzac Day 2026 substitute holiday trap

One task across 30 published runs. Inspect the scores and outputs together, with each run's execution method shown.

All experimentsModel resultsDesigner buildsCompare models
Task
AUSFA-0012
Domain
Australian accounting
Difficulty
hard

Leading published run: grok-composer-2.5-fast (default reasoning) at 100.0% composite. Lowest: deepseek-v4-flash at 0.0%. 30 published runs shown on this task.

How this task was evaluated

Results are ordered by this task's published score. API runs use one prompt and one completion; agent runs use a coding harness with tools and iteration. Inspect the execution method when comparing results.

Objective scores use the benchmark's execution checks. Judge scores use a vision panel's fixed rubric; the published score leaves out a model's own family. Missing values are labelled rather than treated as zero.

Read the brief

This is a benchmarking hypothetical, not legal advice. The facts are as at FY2025-26. Anzac Day in 2026 falls on a Saturday. A payroll officer asks whether there is an extra substitute public holiday on the following Monday for all employees across Australia. Answer correctly. Explain whether the additional Monday public holiday applies right across the country, or just in particular jurisdictions. Be specific about whether the additional Monday is a uniform entitlement everywhere, and about what an employee's answer turns on. Do not claim a single national substitute Monday that applies to everyone.

xAIgrok-composer-2.5-fast
default reasoning
Agent harness2026-06-25
Composite 100.0%Objective 100.0%
Open outputFull run
Moonshotkimi-k3
default reasoning
API single-shot2026-07-17
Composite 66.7%Objective 66.7%
Open outputFull run
Anthropicclaude-opus-4-8
Low reasoning
Agent harness2026-07-21
Composite 33.3%Objective 33.3%
Open outputFull run
Anthropicclaude-opus-4-8
Medium reasoning
Agent harness2026-07-21
Composite 33.3%Objective 33.3%
Open outputFull run
Anthropicclaude-opus-4-8
High reasoning
Agent harness2026-07-21
Composite 33.3%Objective 33.3%
Open outputFull run
Anthropicclaude-sonnet-4-6
High reasoning
Agent harness2026-07-21
Composite 33.3%Objective 33.3%
Open outputFull run
Anthropicclaude-fable-5
High reasoning
Agent harness2026-07-09
Composite 33.3%Objective 33.3%
Open outputFull run
Zhipuglm-5.2
default reasoning
API single-shot2026-07-17
Composite 33.3%Objective 33.3%
Open outputFull run
Moonshotkimi-k2.7-code
default reasoning
API single-shot2026-07-17
Composite 33.3%Objective 33.3%
Open outputFull run
OpenAIgpt-5.6-sol
High reasoning
API single-shot2026-07-09
Composite 33.3%Objective 33.3%
Open outputFull run
OpenAIgpt-5.6-luna
High reasoning
API single-shot2026-07-09
Composite 33.3%Objective 33.3%
Open outputFull run
Googlegemini-3.1-flash-lite
default reasoning
API single-shot2026-06-23
Composite 33.3%Objective 33.3%
Open outputFull run
xAIgrok-4.5
Low reasoning
API single-shot2026-07-09
Composite 33.3%Objective 33.3%
Open outputFull run
DeepSeekdeepseek-v4-pro
default reasoning
API single-shot2026-06-25
Composite 33.3%Objective 33.3%
Open outputFull run
Anthropicclaude-opus-4-8
Extra-high reasoning
Agent harness2026-07-21
Composite 0.0%Objective 0.0%
Open outputFull run
Anthropicclaude-opus-4-8
Max reasoning
Agent harness2026-07-21
Composite 0.0%Objective 0.0%
Open outputFull run
Anthropicclaude-sonnet-5
High reasoning
Agent harness2026-07-21
Composite 0.0%Objective 0.0%
Open outputFull run
Anthropicclaude-haiku-4-5
High reasoning
Agent harness2026-07-09
Composite 0.0%Objective 0.0%
Open outputFull run
OpenAIgpt-5.5
High reasoning
API single-shot2026-07-17
Composite 0.0%Objective 0.0%
Open outputFull run
OpenAIgpt-5.4-mini
High reasoning
API single-shot2026-06-23
Composite 0.0%Objective 0.0%
Open outputFull run
OpenAIgpt-5.6-sol
Max reasoning
API single-shot2026-07-09
Composite 0.0%Objective 0.0%
Open outputFull run
OpenAIgpt-5.6-terra
High reasoning
API single-shot2026-07-09
Composite 0.0%Objective 0.0%
Open outputFull run
Googlegemini-3.1-pro-preview
High reasoning
API single-shot2026-06-23
Composite 0.0%Objective 0.0%
Open outputFull run
Googlegemini-3.5-flash
default reasoning
API single-shot2026-06-23
Composite 0.0%Objective 0.0%
Open outputFull run
xAIgrok-4.5
High reasoning
API single-shot2026-07-09
Composite 0.0%Objective 0.0%
Open outputFull run
xAIgrok-4.5
Medium reasoning
API single-shot2026-07-09
Composite 0.0%Objective 0.0%
Open outputFull run
xAIgrok-4.3
default reasoning
API single-shot2026-07-03
Composite 0.0%Objective 0.0%
Open outputFull run
xAIgrok-4.20-reasoning
default reasoning
API single-shot2026-06-25
Composite 0.0%Objective 0.0%
Open outputFull run
xAIgrok-build-0.1
default reasoning
API single-shot2026-06-25
Composite 0.0%Objective 0.0%
Open outputFull run
DeepSeekdeepseek-v4-flash
default reasoning
API single-shot2026-06-25
Composite 0.0%Objective 0.0%
Open outputFull run

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