Why Comparing Reported Hallucination Rates Between Models Often Misleads Decision Makers

https://brooksssuperbperspectives.overblog.fr/2026/03/why-claude-4.5-haiku-fast-can-report-a-25-hallucination-rate-practical-tradeoffs-and-what-to-do-about-them.html

Why product teams and researchers get conflicting claims about "0% hallucination" People see short, catchy claims—like "0% hallucination"—and treat them as a single authoritative number. That’s a mistake