AI hallucination—the generation of false or fabricated information by language...

https://astro-wiki.win/index.php/Why_the_Claude_4.6_Opus_12.2%25_vs_Sonnet_10.6%25_Size_Tradeoff_Actually_Matters_in_Production

AI hallucination—the generation of false or fabricated information by language models—remains a critical challenge in deploying these systems reliably