ChatGPT topic ownership is rare, and SEO alone doesn’t explain it

Solely 15.2% of ChatGPT matter classes had a transparent model proprietor throughout associated purchaser questions, based on a Semrush evaluation.

Which means about 85% of classes had no dominant model. Showing in a single immediate didn’t imply a model appeared persistently throughout associated questions in the identical matter.

How possession was outlined. Semrush outlined a class proprietor because the model with the very best share of mentions, showing in at the least 4 of 5 associated prompts and main the runner-up by at the least 5 proportion factors.

• Solely 15.2% of the 1,094 classes met that commonplace.
• One other 31.2% had an rising chief, with one model showing in at the least three prompts however with out the required lead.
• The remaining 53.7% had been unsettled, with no model showing in at the least three of 5 prompts.

In style subjects, few clear homeowners. Semrush break up classes into two teams by AI search demand. Solely 11.3% of subjects within the high half had a transparent proprietor, in contrast with 19% within the backside half.

• The highest half accounted for 98% of the AI search quantity within the pattern.
• Most ChatGPT demand Semrush tracked was in classes with no clear model proprietor.

Broad search engine marketing metrics had restricted predictive worth. Conventional search engine marketing power didn’t reliably predict which manufacturers owned ChatGPT subjects. “Conventional search engine marketing metrics aren’t sufficient to elucidate who owns a subject. Whereas they play their position, there’s extra to it,” wrote Kevin Indig, founding father of Progress Memo.

• Semrush in contrast class homeowners with runners-up throughout branded search quantity, natural visitors, and Authority Rating.
• House owners had greater branded search quantity in 55.7% of comparisons, greater natural visitors in 48.4%, and a better Authority Rating in 52.5%. Branded search quantity was the one metric that reached statistical significance.

Most-cited not often meant most-mentioned. Semrush measured possession by model mentions in ChatGPT’s reply textual content, not by the hyperlinks cited under.

• Mentions and citations typically didn’t align. Solely 21% of the most-cited domains in a class had been additionally the most-mentioned model.

Why we care. Semrush discovered that prompt-level visibility didn’t at all times carry throughout associated purchaser questions. That implies topic-level visibility is extra helpful for assessing whether or not ChatGPT persistently associates a model with a class.

Manufacturers that owned a subject often stored it. Clear class homeowners stayed in first place in 90.4% of month-over-month comparisons. Weaker leaders modified extra typically, with the highest model switching in 1,950 of 5,470 comparisons throughout rising and unsettled classes.

Slender leads had been much less steady. When a high model later misplaced first place, its typical lead was simply 1.3 proportion factors. When it stayed on high, its typical lead was 2.9 factors, greater than twice as massive.

• Semrush stated the info didn’t clarify why leaders modified. It confirmed solely that manufacturers with smaller leads had been extra more likely to lose first place.

In regards to the information. Semrush and Kevin Indig analyzed 1,094 U.S. classes in ChatGPT from January by means of June 2026 utilizing the Semrush AI Visibility Toolkit. The dataset coated greater than 50,000 manufacturers, 220,000 domains, 600,000 citations, and 220,000 URLs. Every class included 5 prompts tied to widespread purchaser questions, together with definitions, comparisons, alternate options, use circumstances, and shopping for selections.

The examine. AI visibility is a topic-level game: A study of 50,000 brands in ChatGPT [Study]