  Hallucinations pose a significant challenge to the reliability of large
language models (LLMs) in critical domains. Recent benchmarks designed to
assess LLM hallucinations within conventional NLP tasks, such as
knowledge-intensive question answering (QA) and summarization, are insufficient
for capturing the complexities of user-LLM interactions in dynamic, real-world
settings. To address this gap, we introduce HaluEval-Wild, the first benchmark
specifically designed to evaluate LLM hallucinations in the wild. We
meticulously collect challenging (adversarially filtered by Alpaca) user
queries from existing real-world user-LLM interaction datasets, including
ShareGPT, to evaluate the hallucination rates of various LLMs. Upon analyzing
the collected queries, we categorize them into five distinct types, which
enables a fine-grained analysis of the types of hallucinations LLMs exhibit,
and synthesize the reference answers with the powerful GPT-4 model and
retrieval-augmented generation (RAG). Our benchmark offers a novel approach
towards enhancing our comprehension and improvement of LLM reliability in
scenarios reflective of real-world interactions. Our benchmark is available at
https://github.com/Dianezzy/HaluEval-Wild.
