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ChatGPT Mostly Source Wikipedia; Google AI Overviews Mostly Source Reddit

A study from Profound of OpenAI's ChatGPT, Google AI Overviews and Perplexity shows that while ChatGPT mostly sources its information from Wikipedia, Google AI Overviews and Perplexity mostly source their information from Reddit.

The study looked at 30 million citations across ChatGPT, Google AI Overviews, and Perplexity from August 2024 to June 2025. Read more