Intro: The Core Shift – AI Search Is Still Up for Grabs

If you've been waiting for the right moment to invest in AI search optimization, that moment is now. New data from Kevin Indig, based on six months of ChatGPT answers from Semrush, shows that 89.3% of estimated AI search demand sits inside categories with no clear brand owner. That's an unusually generous head start for any business willing to act strategically.

Here's the key number: only 15.2% of categories had a clear owner as of June 2026. A clear owner means one brand appears in at least four of five test prompts and beats the runner-up by five percentage points or more. The rest – 53.7% of categories – are open fields with multiple credible contenders and no brand close to locking the door.

Why this matters for your bottom line: the categories worth the most money – the high-volume half accounting for 98% of all AI search demand – have an even lower ownership rate of 11.3%. The most valuable real estate in AI search is the least decided. Businesses that move now can capture demand that will be far harder to win once a category settles.

Analysis: What the Data Reveals About Ownership and Vulnerability

Topical Authority Is Real – And It's Durable

Indig's analysis resolves a long-running debate: does topical authority carry over into AI search? The answer is yes, and the reason is durability. Once a brand earns an outsized share of mentions in a category, it tends to hold onto it. A clear owner held first place in 90.4% of month-over-month comparisons.

But durability cuts both ways. Categories where the leader changed had a median lead of just 1.3 percentage points going into the switch. Categories where the leader held on had a median lead of 2.9 points. The lesson: a one- or two-point lead is not a lead worth defending. If you're in that range, assume you're still in a fight.

Citations ≠ Brand Mentions: The Decoupling That Changes Strategy

One of the most counterintuitive findings: citations and brand mentions are only weakly related, with a slightly negative correlation of -0.229. The most frequently cited domain in a category matched the most frequently mentioned brand only 20.8% of the time. But the most mentioned brand was cited at least once 69.9% of the time.

What this means: getting cited a lot doesn't automatically make you the brand ChatGPT reaches for by default. Citations are a door, not the room. Many businesses have focused their GEO (Generative Engine Optimization) strategy on citation counts because citations are easy to track. But Indig's data shows that being the brand actually named in the answer is a different game.

What Owners Have That Runners-Up Don't

Owners did share some traits versus their runner-up: higher branded search volume in 55.7% of pairs, higher organic traffic in 48.4%, and a higher Semrush Authority Score in 52.5%. These are correlations, not a formula. But they suggest that traditional brand strength still matters in AI search.

Importantly, growth trajectory alone didn't predict ownership. Indig shows three examples where a leading brand trended upward month over month and still got overtaken because a competitor grew faster or closed a narrow gap. Momentum is not meaningless, but it's not decisive.

Strategic Implications: Why Citations Aren't Enough

The GEO conversation over the past year has fixated almost entirely on citation counts. Indig's data says that's a mistake. Citations earn your way into the answer set, but they don't determine whether you're the brand actually named once you're in the room.

To win the name game, you need to optimize for the specific content types that ChatGPT uses to answer all five prompt variations: definition, comparison, alternatives list, use case, and buying decision. That means investing in comparison pages, proof points, third-party coverage, and clear positioning – not just more citations.

Practitioners who keep optimizing for the door while a competitor optimizes for being the name ChatGPT actually says out loud are going to lose categories they thought they were winning.

Bottom Line: Your 90-Day Playbook for AI Search Dominance

The window Indig describes won't stay open. Here's what to do in the next quarter:

  1. Pick your battlefield. List the 10 to 20 categories where your brand needs to be the default answer. Measure your current share of mentions across the five prompt types.
  2. Sort by lead size, not by whether you're currently winning. A category where you lead by 1.5 points is not a category you've won. Treat anything under roughly 3 points as contested and put real resourcing behind closing the remaining prompt gaps.
  3. Stop chasing citations as the whole strategy. Use citations to earn your way into the answer set, then shift budget toward the specific content types that determine whether you're the brand actually named.

Eighty-nine percent of demand sitting in unsettled categories is an unusually generous head start. The brands that move on it in the next few quarters – rather than treating this as one more report to bookmark – are the ones that will still be the default answer when somebody runs this same study in 2027.



Source: Search Engine Journal

FAQ

A brand that appears in at least four of five test prompts and beats the runner-up by five percentage points or more. Only 15.2% of categories have one.

Citations and brand mentions have a slightly negative correlation (-0.229). Being cited often doesn't mean ChatGPT will name your brand. You need to optimize for being the default answer, not just a cited source.

Pick 10-20 key categories, track your share across five prompt types (definition, comparison, alternatives, use case, buying), and invest in content that positions your brand as the answer – not just more citations.

No. 89.3% of AI search demand is still unsettled. The window is open, but it won't stay open long. Act within the next quarter to establish a durable lead.