2 tagged with "Anomaly Detection"

Detecting irregularities and duplicate entries in plain-text ledger data

June 26, 2026·mike

AD-LLM Benchmark: GPT-4o Hits 0.93+ AUROC Zero-Shot for Text Anomaly Detection

AD-LLM benchmarks GPT-4o and Llama 3.1 8B across three anomaly detection roles — zero-shot detector, data augmenter, and model selector — on five NLP datasets; GPT-4o reaches AUROC 0.93–0.99 zero-shot, but LLM-based model selection remains unreliable, with direct implications for financial audit AI.

CausalTAD: Causal Column Ordering for LLM Tabular Anomaly Detection

CausalTAD improves LLM-based tabular anomaly detection by reordering table columns to respect causal dependencies before serialization, lifting average AUC-ROC from 0.803 to 0.834 over AnoLLM on mixed-type benchmarks — with direct implications for detecting anomalies in structured ledger data.

llm

machine-learning

fraud-detection