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AI Source Map · October 2026

How often ChatGPT and Claude read wikipedia.org before they make a recommendation

For each assistant, country and kind of business: the share of answers that read wikipedia.org, the share that cited it, and its rank among the sites read there.

wikipedia.org
52%of answers read wikipedia.org
ChatGPT: answers that read it
66%
Claude: answers that read it
0.4%
Cited as a source
0%
Rank among all sources
2

Download the data as JSON

In October 2026, ChatGPT and Claude answered 3,256 questions about businesses, software and brands with web search on. They read wikipedia.org in 52% of them and gave it as the source of a recommendation in 0%. It is number 2 among all sources. It ranks highest in the United Kingdom, where 71% of answers read it, and for architects, where 81% did.

By assistant

Each assistant’s share of its own answers with web search on.

Compare assistant statistics
By assistant
AssistantReadCitedAnswers
ChatGPT2,580 answers66%0%2,580
Claude676 answers0.4%0.1%676

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Anyone may publish this chart, with the credit line that links to this page.

How often ChatGPT and Claude read wikipedia.org and where it ranks highest, October 2026
<a href="https://aigrow.gg/ai-sources/site/wikipedia.org"><img src="https://aigrow.gg/og/ai-sources-site-wikipedia.org.jpg" width="1200" height="630" alt="How often ChatGPT and Claude read wikipedia.org and where it ranks highest, October 2026" style="max-width:100%;height:auto"></a>
<p><a href="https://aigrow.gg/ai-sources/site/wikipedia.org">Source: AIGROW AI Source Map, October 2026</a></p>

By country

Countries with at least 5 answers where wikipedia.org was read, the most read first. Rank is its place among the sources read there.

By country
CountryReadRankCitedAnswers
United KingdomCited 0% · 228 answers71%20%228
GermanyCited 0% · 228 answers69%20%228
FranceCited 0% · 228 answers68%20%228
SwitzerlandCited 0% · 203 answers68%20%203
United StatesCited 0% · 303 answers65%20%303
AustriaCited 0% · 128 answers62%20%128
ItalyCited 0% · 228 answers58%20%228
AustraliaCited 0% · 153 answers58%20%153
CanadaCited 0% · 153 answers54%20%153
IrelandCited 1.0% · 102 answers48%21.0%102
PortugalCited 0% · 103 answers48%20%103
BelgiumCited 0% · 153 answers46%20%153
SpainCited 0% · 178 answers45%30%178
BrazilCited 0% · 127 answers43%20%127
MexicoCited 0% · 128 answers34%20%128
DenmarkCited 0% · 102 answers33%30%102
NorwayCited 0% · 103 answers27%20%103
NetherlandsCited 0% · 153 answers27%50%153
PolandCited 0% · 127 answers23%30%127
SwedenCited 0% · 128 answers22%40%128

By kind of business

Kinds of business with at least 5 answers where wikipedia.org was read, across every country, the most read first.

By kind of business
Kind of businessReadRankCitedAnswers
ArchitectsCited 0% · 108 answers81%10%108
Interior designersCited 0% · 108 answers81%10%108
RestaurantsCited 0% · 108 answers81%10%108
Wedding photographersCited 0% · 108 answers75%20%108
Digital marketing agenciesCited 0% · 108 answers72%20%108
Web design agenciesCited 0% · 108 answers72%20%108
HotelsCited 0% · 108 answers69%20%108
Insurance brokersCited 0% · 108 answers68%20%108
LawyersCited 0% · 108 answers67%10%108
Financial advisorsCited 0% · 108 answers66%20%108
DermatologistsCited 0% · 108 answers65%20%108
GymsCited 0% · 108 answers62%20%108
E-commerce platformsCited 0% · 20 answers60%40%20
PhysiotherapistsCited 0% · 108 answers56%20%108
Payroll softwareCited 0% · 20 answers55%20%20
Car repair shopsCited 0% · 108 answers53%20%108
Real estate agenciesCited 0% · 108 answers53%20%108
VeterinariansCited 0% · 108 answers53%20%108
AccountantsCited 0% · 108 answers52%20%108
Accounting softwareCited 0% · 20 answers45%20%20
Appointment booking softwareCited 0% · 20 answers45%40%20
Restaurant POS systemsCited 0% · 20 answers45%20%20
Hair salonsCited 0% · 108 answers44%30%108
DentistsCited 0% · 108 answers43%20%108
Mobile carriersCited 2.5% · 40 answers43%22.5%40
Moving companiesCited 0% · 108 answers42%20%108
Cleaning servicesCited 0% · 108 answers40%30%108
Electronics retailersCited 0% · 39 answers39%20%39
RoofersCited 0% · 108 answers36%20%108
Energy suppliersCited 0% · 39 answers36%20%39
Driving schoolsCited 0% · 108 answers33%20%108
Car brandsCited 0% · 40 answers30%10%40
Home internet providersCited 0% · 40 answers30%20%40
Website buildersCited 0% · 20 answers30%60%20
ElectriciansCited 0% · 108 answers29%20%108
Car insurance companiesCited 0% · 40 answers28%20%40
SupermarketsCited 0% · 39 answers26%20%39
BanksCited 0% · 40 answers23%20%40
PlumbersCited 0% · 108 answers22%30%108
Email marketing softwareCited 0% · 20 answers20%60%20
Online brokersCited 0% · 39 answers18%30%39
CRM softwareCited 0% · 20 answers15%60%20
Help desk softwareCited 0% · 20 answers15%110%20
Project management softwareCited 0% · 20 answers10%110%20

What this means for a business

In 185 pairs of a kind of business and a country, more than half of the answers read wikipedia.org. For a business in one of them, being listed on wikipedia.org is worth checking. Of the answers that read it, 0.1% also gave it as the source of a recommendation.

architects in the United States: 91%hair salons in the United States: 91%interior designers in the United States: 91%lawyers in the United States: 91%physiotherapists in the United States: 91%restaurants in the United States: 91%wedding photographers in the United States: 91%accountants in France: 88%accountants in Germany: 88%accountants in the United Kingdom: 88%architects in Germany: 88%architects in Italy: 88%

The 12 read most are listed; the data file has all 185.

Questions

Does ChatGPT read wikipedia.org?
Yes. In October 2026, ChatGPT read a page of wikipedia.org in 66% of its 2,580 answers with web search on, and gave it as the source of a recommendation in 0%.
Does Claude read wikipedia.org?
Yes. In October 2026, Claude read a page of wikipedia.org in 0.4% of its 676 answers with web search on, and gave it as the source of a recommendation in 0.1%.
Where do AI assistants read wikipedia.org most?
It ranks highest in the United Kingdom, where 71% of answers read it, and for architects, where 81% did.

How this was measured

The Index method
The question
Each assistant was asked the questions a buyer asks, with web search on: about a local trade in a city, or about software or a consumer brand in a country. Every page its searches returned and every page it gave as a source was kept.
Counting
A site counts once per answer, however many of its pages the answer read. Read is the share of answers that read at least one page of the site; cited is the share that gave one of its pages as the source of a recommendation.
Sources
A site counts as a source only when it appears on 3 or more pages of the Index. Below that it is almost always a business’s own website or a one-off article.
Edition
October 2026. 3,256 answers: ChatGPT 2,580, Claude 676.
Coverage
Not every assistant has answered on every page yet this month, so read each assistant’s shares next to its own number of answers.

Citing this data

AIGROW, AI Source Map, wikipedia.org, October 2026, aigrow.gg/ai-sources/site/wikipedia.org. The figures and the data are published under CC BY 4.0: reuse them with a link to this page.

Download the data as JSON

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Edition October 2026 · data under CC BY 4.0