LLM Hallucination Analysis / RAG Evaluation System
PROBLEM_SPACE
Large Language Models frequently generate confident but incorrect responses when operating without grounded context, limiting reliability in production systems.
ARCHITECTURE
Designed and executed a controlled evaluation pipeline comparing direct prompting vs Retrieval-Augmented Generation (RAG) across 500+ queries. Implemented dense, BM25, and hybrid retrieval strategies with ablation studies on chunking methods and top-k selection. Built a reproducible framework to measure hallucination rate and answer faithfulness.
IMPACT_METRICS
Achieved 27% reduction in hallucination rate using optimized hybrid retrieval. Established a structured evaluation methodology for measuring LLM reliability and grounding effectiveness.