Which Models Perform Better in Inheritance Reasoning?
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 large language models 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. Commercial models demonstrate stronger performance in identifying eligible heirs, applying exclusion rules, and maintaining co...
| Authors | Mohammed Amine Mouhoub, Chahinez Bouchekif |
|---|---|
| Primary category | cs.CL |
| Published | 11 June 2026 |
| Last updated at source | 27 July 2026 |
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