Hallucinations are still a headache in 2026. Rates vary wildly by benchmark, so...

https://wiki-book.win/index.php/The_Confidence_Paradox:_Why_Your_Best_LLMs_Sound_More_Certain_When_They_Are_Wrong

Hallucinations are still a headache in 2026. Rates vary wildly by benchmark, so don't trust vendor claims blindly. With the HalluHard test hitting a 30.2% failure rate even with web search, you need real data. We show how to vet models for your production