Comparing Incompatible Test Methodologies: What Claude 4.1 Opus' "0% Hallucination" Claim Actually Reveals

https://dibz.me/blog/choosing-a-model-when-hallucinations-can-cause-harm-a-facts-benchmark-case-study-1067

1. Why the headline "0% hallucination" is a red flag for careful buyers Why does a clean, absolute number make you uneasy? If a vendor proclaims "Claude 4