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Most-cited websites by ChatGPT

The publishers and platforms ChatGPT actually reaches for when it answers, ranked by citation share, with weekly movement.

Rolling 4 weeks: 49,979 citations · 16,076 model responses · every named domain seen across ≥ 2 independent projects

Top-50 stability: 36% retained week to week: a fast-changing source list

By modelAll models Claude Gemini Grok Google AIO Google AI Mode

This week's movers

Citation-share change, week commencing 2026-09-28 vs 2026-10-05. Minimum 25 citations in both weeks and a 0.2pp move to qualify; domains newly added to monitoring don't count as movers.

Gaining

gob.pe 0.3% → 0.7% ▲ +0.4pp

tesla.com 1.2% → 1.4% ▲ +0.2pp

renault.be 0.3% → 0.4% ▲ +0.2pp

adac.de 0.2% → 0.4% ▲ +0.2pp

europa.eu 0.3% → 0.5% ▲ +0.2pp

Declining

moneyhelper.org.uk 1.3% → 0.4% ▼ -0.8pp

gov.uk 1.3% → 0.7% ▼ -0.6pp

nih.gov 0.7% → 0.2% ▼ -0.5pp

fca.org.uk 0.5% → 0.2% ▼ -0.3pp

gov.co 0.5% → 0.3% ▼ -0.2pp

ChatGPT's top sources

Top 50 domains by share of all citations in the rolling window. The trend column is the weekly share trajectory.

#	Domain	Share	Citations
1	hyundai.com	1.5%	766
2	kia.com	1.5%	740
3	tesla.com	1.1%	552
4	gov.uk	0.9%	462
5	volvocars.com	0.8%	410
6	gov.co	0.6%	302
7	moneyhelper.org.uk	0.6%	292
8	nhs.uk	0.6%	284
9	gob.pe	0.6%	280
10	europa.eu	0.5%	233
11	which.co.uk	0.5%	225
12	trustpilot.com	0.4%	199
13	samsung.com	0.4%	195
14	nih.gov	0.4%	191
15	euroncap.com	0.4%	183
16	reddit.com	0.4%	180
17	gov.ae	0.4%	180
18	techradar.com	0.4%	178
19	medlineplus.gov	0.3%	152
20	renault.be	0.3%	146
21	polestar.com	0.3%	146
22	adac.de	0.3%	144
23	edu.pe	0.3%	141
24	wikipedia.org	0.3%	138
25	fca.org.uk	0.3%	138
26	go.cr	0.2%	122
27	ameli.fr	0.2%	118
28	fi.cr	0.2%	116
29	fda.gov	0.2%	115
30	cdc.gov	0.2%	108
31	nist.gov	0.2%	107
32	renault.fr	0.2%	105
33	support.google.com	0.2%	105
34	gob.mx	0.2%	104
35	emirates.com	0.2%	104
36	abi.org.uk	0.2%	100
37	apple.com	0.2%	99
38	ikea.com	0.2%	97
39	mercedes-benz.be	0.2%	95
40	whowhatwear.com	0.2%	92
41	quechoisir.org	0.2%	92
42	citizensadvice.org.uk	0.2%	89
43	mercedes-benz.com	0.2%	88
44	eurazeo.com	0.2%	86
45	microsoft.com	0.2%	86
46	ico.org.uk	0.2%	86
47	sec.gov	0.2%	85
48	stellantis.com	0.2%	85
49	porsche.com	0.2%	83
50	apnews.com	0.2%	83

The race for the top

Where the leading sources sat against each other, week by week. Rank space makes every crossing an event.

Figure 1The race for the top of the index

Rank within the top 6 sources, week by week. Only the biggest mover is coloured; the greys are the rest of the field.

Data table

Series	21 Sept	28 Sept	5 Oct	12 Oct
hyundai.com	6	1	1	1
kia.com	4	2	2	2
tesla.com	5	4	3	3
gov.uk	2	3	5	5
volvocars.com	3	5	4	4
gov.co	1	6	6	6

5 places gained: hyundai.com, #6 → #1 (12 Oct)

How sourced are the answers?

Citations per response over the last 12 complete weeks: whether the models are leaning on the web more or less.

Figure 2Citations per answer, week by week

Each cell is one model in one week; hotter cells mean answers leaned on more sources. Single-hue ramp; the scale runs from the lowest to the highest cell shown.

Data table

Series	20 Jul	27 Jul	3 Aug	10 Aug	17 Aug	24 Aug	31 Aug	7 Sept	14 Sept	21 Sept	28 Sept	5 Oct
ChatGPT	2.6	2.8	5	3.7	2.7	3.3	3.1	2.7	2.7	2.9	3.1	3.2

Methodology

What's counted: every citation/source URL ChatGPT returned across the rolling 4 ISO weeks, aggregated from every analysis run on BrandInsightAI. Citations deduplicate to one registrable domain per model response.
Quality gate: a domain must appear across ≥ 2 distinct projects to be named; shares are computed against ALL citations in scope, so the gate hides names, never distorts percentages.
Movers: week-over-week comparisons use the two most recent COMPLETE ISO weeks (2026-09-28 → 2026-10-05); the in-progress week is excluded because it refreshes hourly, and a domain must clear the citation floor in BOTH weeks, so a newly monitored category entering the dataset never shows up as a gainer.
Freshness: the snapshot behind this page recomputes every hour. All figures are measured, never estimated.

Where next

This board answers "which websites does AI cite?". These answer the questions that come next — which brands it recommends, which sources each model prefers, and how any of it is counted.

By modelAll models Claude Gemini Grok Google AIO Google AI Mode

Explorer The AI Source Index Dig into which sources each model trusts, filterable by market — compiled into a quarterly report you can download as PowerPoint or PDF. Updated hourly Live leaderboards The Category Index The board behind the story — every category ranked: brand visibility, citation share and how often a read page actually gets cited. Refreshed weekly Live leaderboard The AI Desire Index What AI assistants want from a brand: attraction, affinity and attachment for every brand in every category, indexed and refreshed weekly. Refreshed weekly Journal Analysis & articles The data journalism series — weekly citation movers, model vs model, what gets cited and why. Every edition reviewed before it publishes. New articles weekly Data story The Category Report How AI shops for Britain: the brands ChatGPT, Claude and Gemini actually recommend across 20 consumer categories, told as an animated story. Refreshed weekly Reference Methodology How every number is measured: real AI answers, counted not estimated, with sample sizes and limitations stated on every page. The rules behind it all Start here Insights overview The whole picture in one page: every live board, every data story and every published analysis, with what each one answers. The map of everything