5 Practical Checks to Expose Hallucinations in Reasoning Models and Make Cost-Driven Deployment Decisions

https://milosinsightfulthoughtss.wpsuo.com/how-a-research-lab-using-gpt-4o-mini-and-llama-3-6-encountered-conflicting-factuality-scores-in-april-2025

Why this list will save you from trusting headline accuracy numbers If you rely on vendor claims or single-number benchmarks to choose a reasoning model for production, you are almost certainly missing critical failure modes