Public sentiment analysis and topic modeling regarding ChatGPT in mental health on Reddit: Negative sentiments increase over time

Negative sentiment about ChatGPT in mental health is growing over time, with concerns primarily focused on the AI providing poor mental health advice, raising questions about whether machines can replace human therapists, and broader anxieties about AI's societal role.

Public concerns extend beyond clinical accuracy to include worries about data privacy and philosophical questions about AI's value compared to human care, suggesting people view responsible AI in mental health through multiple lenses beyond just effectiveness.

Some users see potential benefits in accessibility and affordability, with positive discussions highlighting ChatGPT's counseling effectiveness and mentioning practical advantages like time savings and cost reduction, indicating there is a segment viewing AI as a complementary tool.

The shift toward more negative sentiment over time signals growing skepticism, which researchers suggest should inform how trustworthy AI systems in mental health are designed and deployed—indicating that public trust in this domain is declining rather than building.

Mental health is a domain where public opinion matters for responsible AI development, as this study demonstrates that understanding user attitudes on platforms like Reddit can help guide ethical AI development that addresses real public concerns about safety, privacy, and the appropriate role of AI in sensitive healthcare contexts.