AI share of voice: what Comscore's data means

September 23, 2026 · 5 min · Free, with full transcript

Comscore shows ChatGPT's share of AI citations sliding while Gemini and Claude climb. The position here: ChatGPT is not collapsing, it is being diluted, and brand visibility now fractures across three different answer sets. The panic about winning ChatGPT misses that most CMOs have no idea what any of these tools say about their brand on a given day. You come away with a free baseline method: run the same prompt through ChatGPT, Gemini and Claude, screenshot the results and repeat monthly. Also covered: why SEMrush and HubSpot figures carry vendor interest, Forrester's blunter read that no reliable ranking lever exists, and why an open text box at checkout beats a tracking pixel.

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Key takeaways

  • Stop asking how to win ChatGPT and start measuring what all three models say about your brand.
  • Run one prompt through ChatGPT, Gemini and Claude monthly and screenshot the answers as your visibility baseline.
  • Discount vendor claims from SEMrush and HubSpot about tracking or lifting AI mentions, since they sell the software.
  • Add an open text question at checkout asking new customers how they found you, and read the answers.
  • Build a credible footprint on sources models trust, such as Wikipedia and forums, instead of reallocating budget between AI tools.
Read the full transcript

Host:Leaders' Insights Five minutes on ComScore says ChatGPT is losing ground what AI share of voice actually means for CMOs. ComScore dropped numbers last week showing ChatGPT's share of AI citations sliding while Gemini and Claude climb. Everyone read that as ChatGPT collapsing. Is that the story?

Expert:No. And that reading is lazy. ChatGPT isn't collapsing. It's being diluted. The pie got bigger and messier. In early 2025, you optimized for one machine. Now a customer asks Gemini, gets a different set of brands cited than Claude, and both differ from ChatGPT. Your visibility fractured across three answers, not one.

Host:So the panic is misplaced?

Expert:The panic is aimed at the wrong thing. CMOs are asking, how do I win ChatGPT? When the actual problem is they have no idea what any of these tools say about their brand on a given Tuesday. You're flying blind across three cockpits instead of one.

Host:Let me throw three beliefs at you. First one, AI share of voice. The percentage of AI answers that mention your brand is the new SEO ranking, and you optimize it the same way.

Expert:Half true. The instinct is right. The mechanics are wrong. Old search rewarded whoever gamed keywords. These models cite sources they consider trustworthy. WordPress, Wikipedia, forums where humans actually discuss you. SEMrush pushes tools, claiming you can track and lift your AI mentions. And worth flagging, they sell exactly that software, so take the pitch with salt. Forester's independent read is blunter. There's no reliable lever yet. You can influence the inputs. You cannot rank on command.

Host:Second belief, if ChatGPT is losing ground, CMOs should shift budget toward Gemini and Claude.

Expert:Wrong, and expensively so. Shift budget to what? There's no ad unit inside a Claude answer you can buy. You're not moving spend between channels. You're chasing three algorithms that decide who they trust based on your presence, everywhere else. HubSpot published a figure that something like 60% of marketers are already adjusting for AI search. And they sell the marketing software those people use, so that number is doing promotional work. The honest move isn't reallocating budget. It's building the credible footprint all three read from.

Host:Third, attribution is broken now, so measurement is basically hopeless until the tools catch up.

Expert:Wrong, and it's a cop-out. Attribution, tracing which touchpoint drove the sale, was already broken before any of this. People pretended a clean click path existed when half of buying happens in conversations you never see. AI didn't break your measurement. It exposed that it was theater.

Host:That's a strong claim. What replaces the theater?

Expert:Ask new customers where they first heard of you. Sounds primitive. It works. One direct-to-consumer skincare brand I advise added a single open text box at checkout. How'd you find us? And started seeing chat GPT told me, and Gemini recommended it, show up in real volume. No dashboard vendor sold them that insight. A text field and the nerve to read it did.

Host:But that's self-reported. Isn't that the softest data there is?

Expert:Soft data you actually have beats precise data that's fiction. A tracking pixel that can't see inside an AI conversation gives you a confident number about the wrong thing. The survey is fuzzy and pointed at reality. I'll take fuzzy and real, over-sharp and imaginary every day.

Host:So what's a CMO supposed to feel walking away from the comscore numbers, reassured or worried?

Expert:Neither. Curious. The splintering means whoever gets serious about measuring this now, while everyone else argues about chat GPT's obituary, builds a two-year head start. The last time visibility fragmented like this was mobile in 2011. The brands that mapped it early owned the decade.

Host:One thing people can do Monday morning.

Expert:Run the same prompt into Chagitai, Tabtii, Gemini and Claude. What are the best brands for whatever you sell? And screenshot all three. That's your baseline, done in 10 minutes for free. Do it monthly. When your competitor shows up in two answers and you show up in none, you'll know before your revenue does. And you'll have learned it without buying a single dashboard that promises to solve a problem nobody can define yet.

Host:The cheapest research budget in marketing. 10 minutes and the willingness to see something unflattering.

Expert:Most CMOs will spend on the dashboard instead. That's the part I find genuinely funny.

Host:What we read for this one, SEMrush vendor, SEO analytics tools, Forrester research, DigiDay, HubSpot, vendor, CRM, marketing automation. End of episode. The CMO calculators are running at MBA-training.com.

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