ChatGPT Health Shows Variable Consumer Interpretations

Robert Stewart, CTO of Arbital Health, responds to Geoffrey Fowler’s Washington Post piece describing inconsistent ChatGPT Health outputs and consumer confusion. He highlights LLM non-determinism, wearable data noise, RAG risks, and HIPAA/privacy distinctions, and cites false-positive concerns from screening. Stewart recommends combining LLM interfaces with validated predictive models, clinician oversight, strong governance, and transparent uncertainty communication to avoid misleading consumers.