Brand Bias in Prompts: An Experiment

Apr 07, 2026 02:00 PM - 1 week ago 10627

Breaking the brand/non-brand binary

Every hunt query aliases LLM punctual is either marque aliases non-brand, right? Logically, yes, but see a punctual for illustration “Who makes the astir costly luxury cars?”:

The consequence from Google Gemini is supra — I’ve asked it to support the reply short, but the bold highlights are each Gemini’s. What’s the first point you spot? Brands. Even though nary brands are mentioned successful the prompt, the mobility evidently begs a branded answer.

Brand vs. soft-brand vs. non-brand

This research looked astatine 3 sets of prompts (100 each) — brand, “soft-brand”, and non-brand — each of them based connected the taxable “seo tools” and a fistful of pre-selected brands. We intentionally kept the scope narrow, and wrong a domain we understood well. Of course, results whitethorn alteration crossed different taxable areas.

Brand prompts

This is the astir straightforward group. Brand prompts contained a marque sanction aliases branded merchandise straight successful the prompt. Some examples include:

  • "Can I spot humanities Domain Authority information successful the Moz dashboard?"
  • "How galore domains does the Moz nexus scale presently track?"
  • "Is Moz aliases Semrush amended for a beginner successful SEO?"

Note that marque prompts could see brands aliases branded products and metrics.

Soft-brand prompts

The “non-brand” prompts were divided into 2 groups. The soft-brand group utilized our query fan-out research to make prompts successful an open-ended way. Examples include:

  • “Are premium hunt suites worthy the finance for a mini blog?”
  • “Can I usage a instrumentality to find the astir celebrated questions successful my niche?”
  • “How do I reconcile keyword scores from aggregate hunt platforms?”

There’s a bias inherent successful our taxable — questions astir seo devices are people going to see circumstantial devices and brands successful the answers. So, moreover without including a brand-name aliases biasing the strategy toward brands, we’ve already created a soft marque bias.

Non-brand prompts

Given the taxable bias, we nudged the strategy to make prompts that were much tool-adjacent, resulting successful broader, informational questions. For example:

  • “How do you measurement the integrated hunt visibility of a caller website?”
  • “Is it amended to target 1 high-volume word aliases 10 low-volume?”
  • “What is the champion measurement to grip a abrupt driblet successful rankings?”

We’ll telephone these our true non-brand prompts. Even from these fewer examples, it’s astir apt clear that the statement betwixt non-brand and “soft-brand” is simply a grey 1 and depends a batch connected the topic. Brand mentions are an on/off switch, but marque bias is simply a measurement knob.

Brand beingness by punctual type

How often did each type of punctual consequence successful the beingness of a marque successful the output? This is an all-or-none measurement — if immoderate marque was present, past the output was counted. Note that each responses were collected pinch Gemini-3-Flash (via the Vertex API).

Brand mentions by punctual type

The results supra didn’t astonishment me, honestly, but the chart beneath decidedly did. These are the numbers for full marque mentions crossed each type (100 prompts each):

On average, each marque punctual generated 14.5 marque mentions successful the output, which dropped to 1.68 each for the soft-brand group and 0.79 each (<1) for the non-brand group. Seeding the marque successful a punctual not only makes a branded consequence almost guaranteed, but it’s apt to thrust aggregate marque mentions (and, successful galore cases, competitor mentions).

Be observant what you wish for

As we effort to amended our model into “AI” marque visibility, we person to see not only really dramatically marque mentions tin displacement output, but the full spectrum of marque bias. The measurement we building our questions aliases moreover the topics that thrust those questions tin dramatically effect really an LLM surfaces brands.

There will surely beryllium times erstwhile we want to cognize really LLMs respect our brands and our competitors’ brands, and there’s nary specified point arsenic a wholly unbiased position of the world, but it’s captious that our punctual search and punctual procreation bespeak a assortment of searcher intent, including marque intent. In the world of earthy language, we besides person to move beyond the brand/non-brand binary and deliberation astir really a punctual mightiness people thrust marque visibility moreover without mentioning circumstantial brands.

There’s nary one-size-fits-all reply here, and I can’t springiness you a magic number for marque mentions, but arsenic always, the cardinal is consciousness and diversification. Just for illustration you mightiness abstracted branded and non-branded keywords successful integrated and paid search, it’s important to deliberation astir really brand, soft-brand, and non-brand prompts mightiness bias your AI/LLM visibility.

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