ChatGPT Cites Wikipedia in 2.7% of Answers vs 23.1% for Perplexity

ChatGPT links to Wikipedia in 2.7% of its answers to everyday questions, fewer than three in a hundred. Perplexity cites Wikipedia in 23.1% of answers and Google's AI Overviews in 19.4%, so the encyclopedia's reach in AI depends on the engine.

Answers citing Wikipedia by AI engine

Perplexity

23.1%

Google AI Overviews

19.4%

Google AI Mode

13.8%

Gemini

3.9%

ChatGPT

2.7%

Source: Suff Digital analysis of 25,940 AI answers, 5,968 of them from ChatGPT · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026

Wikipedia citations by AI engine

Google AI Overviews

1,141

Google AI Mode

985

Perplexity

979

Gemini

248

ChatGPT

178

Source: Suff Digital analysis of 25,940 AI answers, 5,968 of them from ChatGPT · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026

ChatGPT answers citing Wikipedia by question topic

Pets

8.8%

Food

7.2%

Energy

7.2%

Travel

7.2%

Home

6.2%

Legal

5.7%

Parenting

5.7%

Nutrition

4.1%

Fitness

Beauty

Credit

Insurance

Mortgage

Real estate

Taxes

Source: Suff Digital analysis of 25,940 AI answers, 5,968 of them from ChatGPT · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026

Source: ChatGPT Cites Wikipedia in 2.7% of Answers vs 23.1% for Perplexity - Suff Digital