The text discusses the evaluation of Large Language Models (LLMs) in Retrieval-Augmented Generation (RAG) systems. It highlights the importance of comprehensively assessing LLMs for RAG tasks, considering various dimensions such as instructional purposes, context length, domain, and information integration. The text also introduces ChainPoll, a high-efficacy method for LLM hallucination detection, which leverages chain-of-thought prompting and polling to provide accurate and detailed explanations. ChainPoll is compared to other evaluation metrics like RAGAS (Retrieval Augmented Generation Assessment) and TruLens, highlighting its advantages in terms of accuracy, cost-effectiveness, and efficiency. The text also discusses the limitations of existing benchmarks, such as ChatRAG-Bench, and proposes a new approach called CRAG (Comprehensive RAG Benchmark), which aims to comprehensively evaluate LLMs for RAG tasks. Additionally, the text provides guidance on how to evaluate RAG systems, including defining clear objectives, selecting appropriate benchmarks, conducting comprehensive testing, and incorporating human evaluations.