ChatGPT says look for digital X-rays, never which dentist has them

Short answer: when ChatGPT recommends a dentist for its technology, it never says which technology. Across four countries, it credits 30 named dentists with "advanced technology", "modern facilities" or "cutting-edge" care, and names the tool for none of them. Yet in 17 of its 104 answers about dentists, its list of tips tells the reader to look for digital X-rays. Gemini names something for 50 of the 80 dentists it praises this way: Invisalign, an intraoral scanner, a panoramic X-ray on site. Across all trades, 256 passages credit a named business with technology, and 140 of them give only an adjective. The adjective cannot be checked. The tool can.

"Advanced technology" cannot be checked. "Digital X-rays" can.

What was measured

Our four studies, re-read on October 9, 2026: the same buyer questions ("a good dentist in Glasgow", "the best garage in Lyon") put to ChatGPT (gpt-4o-mini) and Gemini through their APIs, without web search, in the United States (collected September 13, 2026), the United Kingdom (July 31), France (July 30) and Brazil (August 6). 3,600 answers, cut into passages; we kept the 16,022 that name a business, with the same cleaning as our recent editions. In each, we looked for technology given as a reason, in two forms, in English, French and Portuguese. The adjective: "state-of-the-art", "cutting-edge", "latest technology", "modern equipment", "technologies de pointe", "tecnologia de ponta", "equipamentos de última geração". The named tool: digital X-rays, an intraoral scanner, 3D imaging, CEREC, Invisalign, a laser, HydraFacial, computer diagnostics, a camera inspection, accounting software. Each detector was tested on phrasings it must catch and phrasings it must not ("a modern, minimalist interior", "advanced degrees in law", "a digital marketing agency"). Then we widened both vocabularies (plurals, "alta tecnologia", "plateau technique", "diagnóstico computadorizado", "laser treatments") and read everything they found: 381 passages. We removed 125: general advice that names no business ("look for practices that use digital X-rays, laser dentistry"), hair techniques ("the latest techniques, including balayage"), "panoramic views" from hotel rooftops, a marketing agency "laser-focused" on search, a London garage recommended for cars that do not rely on computer diagnostics, and an example ChatGPT itself labelled "exemplo fictício". 256 remain. When a tool follows the adjective ("high-tech equipment (like camera inspections)"), the passage counts as naming it; a tool counts whether it is presented as equipment or as a service ("laser treatments").

The vocabulary is in the advice, not in the recommendation

ChatGPT knows the words. In 17 of its 104 answers about dentists, its tips say to look for digital X-rays, often with laser dentistry and 3D imaging. The dentists it then names are "known for modern facilities and technology" or offer "a focus on patient comfort and advanced technology": 30 times, and never a tool. Over all trades, ChatGPT gives only an adjective in 62 of its 82 passages, Gemini in 78 of 174. In dentistry, Gemini names something for 50 of 80 dentists: Invisalign 26 times, often as a section heading (in São Paulo, "Ortodontia e Alinhadores (Invisalign)"), then intraoral scanners, digital impressions, 3D imaging, a panoramic X-ray on site. Elsewhere, the tool appears where the trade has one with a name: computer or electronic diagnostics for garages (23 passages), lasers and HydraFacial in beauty salons, camera inspections for plumbers and, in Brazil, the geophone that finds hidden leaks. Hotels get "high-tech amenities" and "modern facilities" 13 times, and nothing named. Brazilian locksmiths get "equipamentos de ponta" or "modernos" 13 times out of 15. For the Bosch Service garage network, Gemini writes nearly the same sentence, "equipamentos de diagnóstico de última geração" (latest-generation diagnostic equipment), in Salvador, Recife, Campinas and Goiânia. Same shape as the environment: AI says green 135 times and names one certification.

The advertising code draws the same line

The United Kingdom's advertising code (the CAP Code, section 3, read on October 9, 2026) separates the two kinds of claim. Rule 3.2 allows "obvious exaggerations ('puffery')" that the average consumer is unlikely to take literally, as long as they do not materially mislead. Rule 3.7 requires marketers to hold documentary evidence for claims consumers are likely to regard as objective. "We take digital X-rays" is the second kind: true or false, and a patient can ask. Whether "state-of-the-art" is puffery depends on the case; the code does not rule word by word. For the dentists it names, ChatGPT repeats only the kind of praise that cannot be checked.

What it means if you are the business

If you have the equipment, name it, plainly, where it can be read: on your site, on the page for each service, in your map listing. "Digital X-rays", "an intraoral scanner, no impression paste", "computer diagnostics on every car", "a camera inspection before we dig". Gemini, at least, passes names on: it names the tool for 50 of the 80 dentists it praises for technology. We did not measure where either model learned what it says, so this is a reasonable step, not a lever with a known effect; ChatGPT, in this measurement, does not pass the name on. Write only what you have: a named tool is a claim a customer can check, and in the United Kingdom one the advertising code asks you to be able to prove. Nothing here guarantees being named.

What this does not prove

• These are the models' answers through their APIs, without web search: the way our audit asks. Consumer apps with search switched on may quote a practice's own site; this measurement does not see that.
• A technology claim worded outside both vocabularies is missed. We widened the adjective side and the tool side the same way and read everything both found, so neither side was searched harder than the other.
• The line between an adjective and a tool is ours: computer or electronic diagnostics counts as a tool, "modern equipment for cloning keys" as an adjective. Moving a borderline case changes a total by a few units; it does not change ChatGPT's 30 dentists.
• We did not check that the businesses own the equipment named. Twice, Gemini gives the same dentist's name in two cities (Rio de Janeiro and Goiânia, Bordeaux and Toulouse), both times with Invisalign.
• Four studies collected between July 30 and September 13, 2026, one pass per question. The models have moved since.