In 2026, there is no "true" hallucination rate. Measuring grounding via Vectara...

https://city-wiki.win/index.php/Gemini_vs_Claude:_When_Should_I_Pick_Gemini_Anyway%3F

In 2026, there is no "true" hallucination rate. Measuring grounding via Vectara HHEM gives a different picture than testing search-based accuracy with HalluHard