Which Models Perform Better in Inheritance Reasoning?
Quick Answer
The study evaluates large language models in Arabic Islamic inheritance reasoning, revealing that commercial models outperform open-source ones.
Quick Take
Notably, Gemini 2.5 Flash achieved the highest reliability with an MRE of 0.989, excelling in identifying heirs and applying legal rules.
Key Points
- Commercial models show superior performance in structured legal reasoning tasks.
- Gemini 2.5 Flash achieved an MRE of 0.989, the highest in the study.
- Open-source models demonstrated instability, especially in complex legal scenarios.
- The evaluation highlights a significant reliability gap between model families.
- Effective legal interpretation requires multi-step reasoning and precise computation.
Paper Resources
Source Excerpt
arXiv:2606. 13751v1 Announce Type: new Abstract: This paper presents the participation of team PSL in the QIAS 2026 Shared Task on Arabic Islamic inheritance reasoning. The task evaluates the ability of to solve inheritance cases that require legal interpretation, multi-step reasoning, and precise numerical computation.
We compare \textit{commercial} and \textit{open-source} models under a unified prompting strategy to assess their effectiveness in structured legal reasoning with minimal task-specific adaptation. \\ Our results show a clear gap in reliability between the two model families. …
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