What the research found
Researchers put 90 questions about depression in later life, written from the view of older adults and family carers and split evenly by risk level, to three consumer chatbots (ChatGPT, Gemini and Doubao), and two psychiatrists rated the 270 answers blind. Overall 78.9%, 72.2% and 60.0% of answers were clinically acceptable, falling to 63.3%, 50.0% and 36.7% on high-risk questions, where 16.7% to 36.7% were under-triaged. The question set was deliberately weighted toward risk, so the figures are a stress test rather than real-world rates.
Older adults and their carers already ask chatbots about low mood, and the questions most likely to be under-triaged are the ones where a delay matters most.