Do ChatGPT and Google recommend the same top brand?

A matched pair is one answer from each engine to the same organic prompt, run at the same time. ChatGPT Search and Google AI Mode chose the same top brand in 29,616 of 81,800 matched answer pairs, or 36.2054%. They chose different top brands in 52,184 pairs, or 63.7946%.

This refines BrightEdge's 61.9% cross-platform disagreement result. BrightEdge compared brand sets across three products. This study compares only the first recommendation across two engines, and it reports the exact number of matched pairs behind the rate. The close rates describe different things, not a replication or contradiction.

The engines chose different top brands in 52,184 pairs. In 30,031 of those disagreements, or 57.5483%, at least one engine still named the other engine's top pick elsewhere in its answer. Both answers named the other top pick in 11,657 pairs, one answer did so in 18,374, and neither did so in 22,153.

A different first recommendation does not always mean two completely separate shortlists. Audit the full named-brand list as well as first place so a rank difference is not mistaken for complete exclusion.

Among 8,477 prompts with at least five matched runs, 943 always produced the same top brand on both engines, or 11.1242%. Another 2,015 prompts, or 23.7702%, never agreed. The remaining 5,519 prompts, or 65.1056%, agreed in some runs and disagreed in others.

One matched check cannot establish a prompt's usual cross-engine pattern. Repeat the same prompt and report agreement frequency before classifying it as aligned or divided.

Among industries with at least 1,000 matched pairs, Hardware had the highest agreement at 684 of 1,480 pairs, or 46.2162%. Professional Services had the lowest at 647 of 2,215, or 29.2099%. Software reached 43.1725%, while Artificial Intelligence reached 33.6169%.

Use an industry baseline before treating a brand's cross-engine agreement as unusual. The spread identifies where separate engine audits matter most. It does not show that industry caused the difference.

ChatGPT Search chose Linear while Google AI Mode chose Atlassian in 146 matched runs across 22 prompts. Datadog and Dynatrace split in that direction 92 times across 19 prompts. Upwork and Toptal also split 92 times across seven prompts.

Repeated named pairs reveal competitive sets worth auditing on both engines. They do not prove a universal head-to-head winner because the prompts and answer contexts differ.

Among brands selected first in at least 100 matched pairs, both engines selected Wise in 148 of 225 pairs where either selected it first, or 65.7778%. The rate was 58.2299% for LinkedIn and 59.8765% for Shopify. It was 8.4746% for Ahrefs, 5.7851% for Cisco, 4.9505% for Anthropic, and 3.2258% for Otterly AI.

These rates identify brand-specific audit priorities, not brand quality. Prompt mix differs by brand, so Compare each brand with its own matched history and named competitors before comparing rates across brands.

The window contained 414,555 answers across the two engines. Exactly 215,354 answers had one clear parent brand in the first recommendation position. The matched-pair rule retained 163,600 of those answers, producing 81,800 unique prompt-and-run pairs with no duplicate pairs or blank brand names. One Google AI Mode answer contained a parent-and-child tie that rolled up to one parent brand.

Rolling a brand up to its parent prevents a parent company on one engine and its child brand on the other from counting as a disagreement when it is not one. Without that rollup, exact-brand agreement was 27,778 of 81,800 pairs, or 33.9584%. The result measures observed recommendation selection, not recommendation quality, factual accuracy, or causation.

The engines agreed on the top brand in 36.2054% of 81,800 matched pairs. Among prompts with at least five matched runs, only 11.1242% always agreed and 65.1056% moved between agreement and disagreement.

Run the same priority prompts on both engines at the same time. Record first place, shortlist inclusion, and repeated-run frequency. Investigate recurring brand pairs and Compare each result with its industry baseline. Rerun this study over the same window length next quarter before treating these observed rates as permanent engine characteristics.