ResearchResearch paperLarge Language Models1 source · Oct 19, 2026

Target-Aware Curation of Hallucination Stress Tests for Large Language Models

We develop a procedure that iteratively edits source-grounded seed prompts to expose hallucinations in a target model.

Key points

  • Hallucination stress tests can yield similar average scores across language models even when different prompts elicit hallucinations in each model.
  • Experiments cover 500 seeds from seven datasets and ten topics, with intrinsic and extrinsic hallucinations evaluated across open-weight and closed-source models.
  • Among 219 prompts that pass model-assisted source-validity checks, 89 elicit responses containing unsupported claims.
  • Curated prompts can be reused across models, but their diagnostic value depends on source validity and the failures they expose in each model.

Sources (1)

  • [1]Target-Aware Curation of Hallucination Stress Tests for Large Language Models
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 19, 08:20 PM
    We develop a procedure that iteratively edits source-grounded seed prompts to expose hallucinations in a target model.
    Hallucination stress tests can yield similar average scores across language models even when different prompts elicit hallucinations in each model.

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 19, 2026Reasoning-Aware Multicalibrated Reliability Predictors for Language Models
  2. Oct 19, 2026Push-based KV transfer to improve TTFT and TPOT for disaggregated inference in vLLM
  3. Oct 19, 2026SPLASH: Contrastive Audit Pressure for Detecting and Localizing Security Hallucinations in Generated Code
  4. Oct 19, 2026From Black Box to Controller: Inference-Time Steering of LLM via Feature Amplification
  5. Oct 18, 2026The World as Viewed by 136 Countries: An Open, Curated, Annotated, and Multilingual Dataset of 118 Million State Media Articles
  6. Oct 17, 2026Medical Fine-Tuning Reshapes, Not Reduces, Patient-Facing AI Risk: A Rubric-Based, LLM-Judge Evaluation Framework

Related