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AI Visibility Index · September 2026

Gyms in Porto that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for gyms in Porto, three times each, in Portuguese, and counted who they named. These are the businesses named in two or more of the 36 answers.

Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.

Gyms · Porto
100%of answers named Holmes Place
Answers
36
Businesses named
24
Named only once
11
Named by 2+ assistants
4 of 13
Named again on a rerun
70%

Edition September 2026. Download the data

Asked for gyms in Porto, ChatGPT, Claude and Gemini most often named Holmes Place (100% of answers), Solinca (100%) and Fitness Hut (89%). Across 36 answers they named 24 different businesses, 11 of them only once. Each of four buyer questions was asked three times, in Portuguese, in September 2026.

The ranking

The AI Recommendation Rate is the fraction of the 36 answers that named a business. The range under it is a 95% confidence interval: where two ranges overlap, the gap between those businesses could be chance.

Gyms in Porto named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1Holmes PlaceAlso written Holmes Place Porto, Holmes Place BoavistaIs this your business?100%95%: 90 to 100%100%100%100%4 of 42
2SolincaAlso written Solinca Dragão, Solinca Health & Fitness Club, Solinca Porto, Solinca Porto Palácio, Solinca Classic, Solinca Classic PortoIs this your business?100%95%: 90 to 100%100%100%100%4 of 42.1
3Fitness HutAlso written Fitness Hut Porto, Fitness Hut Trindade, Fitness Hut Porto BoavistaIs this your business?89%95%: 75 to 96%67%100%100%4 of 42.3
4Basic-FitAlso written Basic-Fit PortoIs this your business?33%95%: 20 to 50%0%100%0%4 of 44
5Pump Fitness SpiritIs this your business?25%95%: 14 to 41%0%0%75%4 of 43.9
6Fitness UPAlso written Fitness UP PortoIs this your business?17%95%: 8 to 32%50%0%0%4 of 42.7
7Fitness 365Is this your business?17%95%: 8 to 32%0%50%0%3 of 44
8Ginásio Clube do PortoIs this your business?11%95%: 4 to 25%0%0%33%3 of 45.3
9Pump ClubAlso written Pump Fitness ClubIs this your business?8%95%: 3 to 22%0%8%17%2 of 44
10Virgin Active PortoIs this your business?8%95%: 3 to 22%0%25%0%3 of 44.3
11Club VIIAlso written Club VII PortoIs this your business?8%95%: 3 to 22%0%0%25%2 of 45
12Ginásio Clube PortuguêsAlso written Ginásio Clube Português - PortoIs this your business?8%95%: 3 to 22%0%25%0%3 of 45.7
13KaloriasIs this your business?6%95%: 2 to 18%0%0%17%1 of 45

Each assistant column is the share of that assistant's own answers. Questions counts how many of the four produced the name at least once; position is where it came in the answer's list, 1 being first. 11 more names came up in a single answer and are counted above but not listed.

Is this your business?

See what the assistants say about your business today. The free checker asks ChatGPT, Claude, Gemini and Grok two of the Index questions for this category, with the category and the place already filled in, and shows every answer word for word. About 30 seconds, no sign-up.

What each assistant said

The same questions, the same number of times, and often different names. Each column is one assistant's top five from the ranking above, with the share of its own answers that named them.

#ChatGPTClaudeGemini
1Holmes Place100%Holmes Place100%Holmes Place100%
2Solinca100%Solinca100%Solinca100%
3Fitness Hut67%Fitness Hut100%Fitness Hut100%
4Fitness UP50%Basic-Fit100%Pump Fitness Spirit75%
5No other name twiceFitness 36550%Ginásio Clube do Porto33%

Named here? Put it on your site

Every business in the ranking was named in two or more answers. The badge says that and nothing more: no position, because the ranges above do not support one. It links back to this page, so anyone can check.

Named by AI assistants: Gyms in Porto, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/gyms/porto"><img src="https://aigrow.gg/badges/index/2026-09/gyms/porto.svg" width="312" height="100" alt="Named by AI assistants: Gyms in Porto, AIGROW AI Visibility Index, September 2026"></a>

The questions

Asked word for word, three times each, to every assistant, in Portuguese. The English under each is our translation. The prompt is the one the free scan uses. No web search, no location and no chat history, so every answer starts from the same place.

  1. 1Qual é o melhor ginásio no Porto?What is the best gym in Porto?
  2. 2Quero inscrever-me num ginásio no Porto. Quais me recomendas?I want to join a gym in Porto. Which ones would you recommend?
  3. 3Que ginásio no Porto é bom para principiantes?Which gym in Porto is good for beginners?
  4. 4Onde posso encontrar um ginásio no Porto com boas aulas de grupo?Where can I find a gym in Porto with good group classes?

How to read this page

What it measures
Which names these models produce when asked cold, from what they learned in training. It is not a review, a rating or our recommendation, and a business missing here may simply be one the models were never shown.
Why the ranges matter
36 answers is a sample. Asked again next month, most shares will move by a few points; the ranges say how far they could move by chance alone.
One business, several spellings
Branches, legal suffixes and spellings of one business are merged, and the other spellings are printed under its name. Names that might be two businesses are kept apart.
A name is wrong
If a business here is closed, misnamed or yours and you want it removed, tell us. We correct or remove it when the page is next published.

Is your business on this list?

The free scan asks the same assistants the questions your customers ask, scores whether they name you, and lists who they name instead.

Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0