GPT-5 vs Claude 4.6 Hallucination Comparison Real Data

https://www.bookmark-step.win/web-retrieval-claims-vs-reality-why-the-73-86-reduction-in-hallucinations-number-breaks-down

OpenAI vs Anthropic Benchmarks: Tracking Hallucination Rates in 2026 Models March 2026 Benchmark Results and Dataset Variability As of March 2026, the hallucination rates across large language models have become a central concern