# ChatGPT voices personal product picks far more than Gemini, AI Overviews

Published: 2026-10-09T05:04:05.454Z · Source: arXiv AI Overviews & brand visibility (https://arxiv.org/abs/2609.18729v1)
Source date: 2026-09-16
Flags: catch-up (Sep 16)
Entities: chatgpt, gemini, ai-overviews

A study curating 2,528 real commercial-advice queries into a dataset called ConsumerQ, posted to arXiv in September 2026, audited 1,536 AI responses across ChatGPT, Google Gemini and Google Search's AI Overviews. ChatGPT expressed a first-person product preference in 79% of its product-recommending responses, compared with 7% for Gemini and 2% for AI Overviews. ChatGPT and Gemini's web interfaces shared only 5.4% of cited domains on average, with zero domain overlap in 76.7% of query comparisons — a gap the researchers note narrows when comparing the same models' raw APIs instead of their consumer interfaces.

Why it matters: The chatbot most willing to state a personal pick is also the one with an advertising incentive to make one, and which assistant a shopper opens changes both the opinion they get and the sites behind it.

## What this answers

**Does ChatGPT give more opinionated product recommendations than other AI tools?**

Yes — an audit of 2,528 real buying queries (the ConsumerQ dataset) found ChatGPT expressed a first-person product preference in 79% of its product-recommending responses, versus 7% for Gemini and 2% for Google AI Overviews.

**Do ChatGPT and Gemini recommend the same websites for the same buying questions?**

Rarely — the study found ChatGPT and Gemini's web interfaces shared only 5.4% of cited domains on average, with no domains in common at all in 76.7% of query comparisons.


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