# QIAS 2026: Overview of the Shared Task on Islamic Inheritance Reasoning

arXiv: https://arxiv.org/abs/2606.13756 · HTML: https://mlsanity.com/paper/2606.13756/

## Key facts

- Cited by 4 papers in the map (data through 14 Oct 2026).
- Builds on 12 of its 34 references that are in the map.
- First posted on arXiv 11 Jun 2026.

## Builds on (most cited first, 12 of 12)

- [Training Verifiers to Solve Math Word Problems](https://mlsanity.com/paper/2110.14168/) (2021)
- [Measuring Mathematical Problem Solving With the MATH Dataset](https://mlsanity.com/paper/2103.03874/) (2021)
- [Falcon-H1R: Pushing the Reasoning Frontiers with a Hybrid Model for Efficient Test-Time Scaling](https://mlsanity.com/paper/2601.02346/) (2026)
- [Assessing Large Language Models on Islamic Legal Reasoning: Evidence from Inheritance Law Evaluation](https://mlsanity.com/paper/2509.01081/) (2025)
- [From RAG to Agentic RAG for Faithful Islamic Question Answering](https://mlsanity.com/paper/2601.07528/) (2026)
- [MAWARITH: A Dataset and Benchmark for Legal Inheritance Reasoning with LLMs](https://mlsanity.com/paper/2603.07539/) (2026)
- [Fanar 2.0: Arabic Generative AI Stack](https://mlsanity.com/paper/2603.16397/) (2026)
- [BriefMe: A Legal NLP Benchmark for Assisting with Legal Briefs](https://mlsanity.com/paper/2506.06619/) (2025)
- [QU-NLP at QIAS 2025 Shared Task: A Two-Phase LLM Fine-Tuning and Retrieval-Augmented Generation Approach for Islamic Inheritance Reasoning](https://mlsanity.com/paper/2508.15854/) (2025)
- [CVPD at QIAS 2025 Shared Task: An Efficient Encoder-Based Approach for Islamic Inheritance Reasoning](https://mlsanity.com/paper/2509.00457/) (2025)
- [CVPD at QIAS 2026: RAG-Guided LLM Reasoning for Al-Mawarith Share Computation and Heir Allocation](https://mlsanity.com/paper/2603.24012/) (2026)
- [QU-NLP at QIAS 2026: Multi-Stage QLoRA Fine-Tuning for Arabic Islamic Inheritance Reasoning](https://mlsanity.com/paper/2604.16396/) (2026)

## Built on by (most cited first, 4 of 4)

- [HalluTruthQA: A Fine-Grained Benchmark for Hallucination Detection, Localization, and Explanation in Arabic Question Answering](https://mlsanity.com/paper/2607.20219/) (2026)
- [HalluTruthQA-4K: A Fine-Grained Corpus and Annotation Process for Arabic Hallucination Detection and Truth Verification](https://mlsanity.com/paper/2608.03966/) (2026)
- [Islamic Large Language Models: From Knowledge Acquisition to Trustworthy and Hallucination-Resistant AI](https://mlsanity.com/paper/2606.16629/) (2026)
- [What Makes a Good Fiqh Retriever? Answer Retrieval for Arabic Islamic Jurisprudence](https://mlsanity.com/paper/2608.20246/) (2026)

## Abstract (arXiv)

This paper presents a comprehensive overview of the QIAS 2026 shared task, organized as part of the OSACT7 Workshop and co-located with LREC 2026. The shared task was designed to evaluate the ability of large language models to perform complex reasoning in the religious and legal domain of Islamic inheritance. Unlike conventional question-answering benchmarks, QIAS 2026 focuses on end-to-end reasoning from natural language cases, requiring systems to perform the full inheritance calculation process, from identifying the eligible heirs to assigning the correct share to each beneficiary. To support this evaluation, the task was based on the MAWARITH benchmark, a dataset of 12,500 Arabic inheritance cases annotated with intermediate reasoning steps and final answers. System submissions were evaluated using MIR-E, a multi-step metric that measures performance across the main stages of inheritance reasoning. A total of 16 teams participated in the shared task, investigating a range of approaches, including prompting-based methods, retrieval-augmented generation, and fine-tuning strategies. The results show that Islamic inheritance remains a highly challenging benchmark for current language models, especially in stages that require precise legal interpretation and structured numerical reasoning. This overview summarizes the task design, dataset, evaluation framework, participating systems, and main results.