[Submitted on 27 Jun 2026]
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Abstract:We introduce 5ting, our system for the SemEval2026 Task 8 (MTRAGEval), which evaluates multi-turn Retrieval Augmented Generation (RAG) systems. Multi turn RAG involves context drift, under specification, and hallucination risk. Our system combines BGE-M3 dense retrieval with FAISS indexing, dual-query merged retrieval, and LLM based reranking, followed by role separated generation constrained to retrieved evidence. The retriever achieved nDCG@5 = 0.4719 in Task A, while the end to end system ranked in Task C with a harmonic score of 0.5597 and RL_F = 0.7692.
Submission history #
From: Thien-Qua T.Nguyen [[view email](/show-email/ac788e84/2606.28737)]
**[v1]** Sat, 27 Jun 2026 05:13:49 UTC (326 KB)
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