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Banja Lab / Benchmarks / Test

AUSFA-0004Australian accounting · medium

Top marginal rate threshold

The same task, run on 27 models. Compare the outputs side by side, or open any one in a popup to inspect it.

Top result: claude-opus-4-8 (low reasoning) at 100.0% composite. Lowest: gemini-3.1-flash-lite at 0.0%. 27 models compared on this task.

How it ran
  • Each model was given the brief below in a fresh, isolated session with no access to our tools, and returned its answer from scratch.
  • The rendered output was scored 1 to 5 on brief fidelity, visual design, craft, and impact by a four-family vision panel - Anthropic (Claude Opus 4.8), OpenAI (GPT-5.5), Google (Gemini 3.1 Pro), and xAI (Grok 4.3) - using one identical prompt so the scores compare. The published judge score is leave-one-family-out: a model is never scored by a judge of its own family, so same-family self-preference is removed.
The brief

This is a benchmarking hypothetical, not tax advice. The figure is as at FY2025-26. For an Australian resident individual in the 2025-26 financial year, state in dollars the taxable income above which the top marginal income tax rate of 45 per cent begins to apply. Give the dollar threshold at which the top bracket starts (the Medicare levy is separate and is not part of this figure). Name the controlling authority that sets the resident individual income tax rates.

Anthropicclaude-opus-4-8
Low reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Medium reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Extra-high reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
Max reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-4-6
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-5
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-fable-5
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Zhipuglm-5.2
default reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
OpenAIgpt-5.4-mini
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Googlegemini-3.5-flash
default reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-4.3
default reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
xAIgrok-composer-2.5-fast
default reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-opus-4-8
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-4-6
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-sonnet-5
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Anthropicclaude-fable-5
High reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
DeepSeekdeepseek-v4-flash
default reasoning
Composite 100.0%Objective 100.0%
Open outputFull run
Moonshotkimi-k2.7-code
default reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
OpenAIgpt-5.5
High reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
Googlegemini-3.1-pro-preview
High reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
xAIgrok-4.20-reasoning
default reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
xAIgrok-build-0.1
default reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
DeepSeekdeepseek-v4-pro
default reasoning
Composite 85.0%Objective 85.0%
Open outputFull run
Anthropicclaude-haiku-4-5
default reasoning
Composite 15.0%Objective 15.0%
Open outputFull run
Anthropicclaude-haiku-4-5
High reasoning
Composite 0.0%Objective 0.0%
Open outputFull run
Googlegemini-3.1-flash-lite
default reasoning
Composite 0.0%Objective 0.0%
Open outputFull run