TL;DR Summary:
Core Finding: The study says a brand mentioned in one ChatGPT topic does not automatically carry the same strength into related topics, especially for named mentions, because the effect depends on how close the new topic is to the brand’s core expertise.Citations Matter More: Citations spread farther than brand mentions, with nearby categories showing stronger results than distant ones, so ChatGPT can still cite a brand outside its core area even when it does not name it as often.Depth Beats Breadth: Brands that show up consistently across repeated prompts build stronger topical authority than brands that appear only once, which means anchor categories matter more than scattered visibility.Does getting your brand mentioned in one topic on ChatGPT help you show up in related topics too? A new study from Semrush and Growth Memo says it depends on what you’re measuring, and the answer matters right now because more buyers are asking ChatGPT for recommendations before they ever visit a website.
What the Topical Authority in ChatGPT Study Actually Measured
The study looked at 1,094 US categories tracked monthly in ChatGPT from January through June 2026. Researchers pulled five prompt variants per category, then counted 283,215 domain-category citation observations and 76,493 brand-mention observations. A citation is a source ChatGPT links to as proof for its answer. A brand mention is when ChatGPT says your brand name directly in the response, whether the tone is positive, negative, or neutral. Keeping these two signals separate is the reason the study’s findings on topical authority in ChatGPT hold up. They show two different behaviors, not one.
Why Citations Travel Farther Than Brand Mentions
In categories close to a brand’s core expertise, brands got cited 74% of the time and named 44% of the time. In categories far from that expertise, those numbers dropped to 50% cited and 25% named. The gap grows sharper when you isolate citations that also included a named mention. Only 18% of citations in distant categories came with a brand name attached. In closely related categories, that number rose to 46%, more than double. This tells you citation presence spreads on its own, but getting named next to it depends heavily on how close the topic is to what you’re already known for. Since citation and mention rates vary so widely by category, brands need a way to actually see this breakdown for themselves rather than guess at it; platforms like SnowSEO are built for exactly this, monitoring whether your brand is cited versus named by name across ChatGPT and Perplexity and letting you compare that share of voice against competitors in specific topical categories.
Depth Builds Topical Authority in ChatGPT, Breadth Alone Doesn’t
The study found a brand appearing in just one of five prompts in a category saw a drop in mention share. That penalty stayed until the brand reached three of five prompts. Citations didn’t work that way. Showing up in even one of five prompts still built some citation share, and showing up in all five built more, with no sign of a spread-thin penalty. Kevin Indig of Growth Memo, who partnered on the research, said the categories where a brand earns repeat named mentions are the ones it can expand from credibly. The practical lesson: chase consistent presence in fewer categories before treating any one of them as a launchpad.
Industry Changes How Far Topical Authority in ChatGPT Can Reach
Finance and real estate brands saw broader prompt coverage tied to stronger citation share, with full five-prompt coverage linked to more citation strength than showing up once. Legal and healthcare told a different story. Even full coverage across all five prompts didn’t reliably lift brand-mention share in those fields, and citation gains from wider coverage were weaker to begin with. If you work in a regulated or trust-heavy field like law or healthcare, expect a higher bar before ChatGPT names you directly, even if it cites you often.
Planning Your Next Move
Start by listing the categories where your brand already earns both citations and named mentions across most prompts. Those are your real anchor points, not every category you’ve touched once. From there, pick your next category based on genuine closeness to that anchor, not just interest or opportunity. Watch for whether ChatGPT names you, not just whether it cites you, since that’s the signal tied most closely to real topical authority in ChatGPT. Tools like SnowSEO can help here, since it tracks your brand’s visibility score across ChatGPT, Perplexity, and other AI providers, showing exactly where you’re being cited versus named so you can identify which categories are true anchor points before expanding into new ones.
