
AI Hallucination Index
The familiar strangers that 250 models keep inventing.
Files & study scope
- 58 slides of findings, charts, and methodology
- 250 models, 7,877 responses, 2.14 million words
- 3-page companion with interpretation notes and a worksheet
March 2026 corpus study. Measures patterns in generated writing; it is not a factual-accuracy ranking.
Read the study

