AI Barometer: 8 findings on what ChatGPT, Claude and Perplexity actually read
Most GEO advice is inferred from the outside — you type prompts and watch who gets cited. Wispra's AI Barometer looks from the other side: server logs. Ten months of assistant reads, referral visits and Search Console data show how fast AI picks up a page, what it reads, and what actually sends visitors. Several findings contradict the usual advice.
of newly listed businesses read by an AI assistant within 24 hours
hits labelled "AI bot" actually comes from a conversational assistant
share of AI assistant visits on Markdown pages vs HTML (25% vs 5%)
of assistant-referred visitors come from ChatGPT
TL;DR
- — AI reads you the next day: 80% of new listings within 24 hours.
- — Only 1 in 5 "AI bot" hits comes from ChatGPT, Claude or Perplexity; Meta alone is 52%.
- — The leader changes every month: Claude took 75% of reads in August, Perplexity 54.6% in September.
- — Assistants read articles (59% of reads), but product pages send 2.5x more visitors per read.
- — Markdown is read by Claude and ChatGPT — not by Google or Perplexity.
- — ChatGPT sends 81.6% of AI visitors; Claude reads a lot but sends 3.4%.
- — 10% of Google impressions come from machine-written queries that exclude platforms with
-site:.
1. AI reads a new page the next day
49% of newly listed businesses were read by an AI assistant the same day, and 31% the next day: 80% within 24 hours, 88% within a week. Only 4% had not been read at all. Over the last 90 days, 78% of directory listings were read by ChatGPT, Claude or Perplexity.
The speed differs by assistant. Median delay to first read: 1 day for Perplexity, 5 days for ChatGPT, 9 days for Claude.
What it means: AI visibility is not a slow burn like classic SEO. A page that exists in a place assistants crawl is in the retrieval pool within a day. The bottleneck is being published somewhere they look — not waiting.
2. Most "AI bot" traffic is not AI assistants
Out of 100 hits labelled as AI robots, here is who actually came:
OpenAI, Anthropic and Perplexity add up to about 20 hits out of 100. Meta's crawlers alone account for 52.
What it means: log dashboards and "AI crawler" reports that lump every AI-sounding user agent together overstate how much assistants read you, by a factor of up to five. Segment by agent: GPTBot, OAI-SearchBot and ChatGPT-User are not the same thing, and neither is Meta's crawler.
3. The leading assistant changes every month
Share of reads among the three assistants, month by month in 2026:
| Month | OpenAI | Anthropic | Perplexity |
|---|---|---|---|
| March | 85.8% | 0.0% | 14.2% |
| April | 64.6% | 31.2% | 4.2% |
| May | 58.6% | 39.1% | 2.3% |
| June | 70.2% | 26.3% | 3.5% |
| July | 69.9% | 26.2% | 3.9% |
| August | 20.4% | 75.0% | 4.7% |
| September | 29.3% | 16.1% | 54.6% |
Monthly leader highlighted.
Claude jumped to 75% in August — and 61% of its quarterly reads happened in a single week. Perplexity took 54.6% in September. Over 90 days the split evens out: OpenAI 45%, Anthropic 41%, Perplexity 14%.
What it means: assistants read in waves, not in a steady stream. A one-month snapshot can crown the wrong engine. Measure over a quarter before reallocating effort between ChatGPT, Claude and Perplexity.
4. Assistants read articles, but product pages bring the visitors
Blog articles make up 59% of what assistants read. But per 1,000 reads, a product or offer page generates 9.4 visitors, against 3.7 for an article — about 2.5x more. Documents, reviews and FAQs also convert reads into visits better than articles. Business profiles, the classic directory listing, come last (2.8).
Two more details. Blog index pages are re-read 2.6x more than individual articles: assistants use hubs to discover content. And tastes differ: Perplexity is the most editorial (66% of its reads are articles), while ChatGPT spends 25% of its reads on business profiles and documents, against 6% for Claude.
What it means: articles get you read; detailed offers get you visited. A page that states price, specs and service area gives the assistant something to recommend — and the user a reason to click.
5. Markdown is read almost only by AI — but not by Google
On the directory, 25% of visits to Markdown pages come from AI assistants, against 5% on HTML pages — a ×5 factor. Within three months, 60% of articles had their Markdown version read by an assistant. The Markdown pages drew zero Google impressions, since they point to the HTML version.
What it means: this reconciles two positions that looked contradictory. Google says AI-specific files get no special treatment in its AI features — and indeed Googlebot reads under 1% Markdown. But Claude and ChatGPT do fetch it. Offer Markdown as an extra for them, canonicalized to the HTML page, and keep the HTML complete and readable without JavaScript: Perplexity and Google read nothing else. More in Technical Foundations.
6. Reading is not referring: ChatGPT sends the visitors
ChatGPT sends 81.6% of the visitors that assistants refer to client websites. And it is accelerating: indexed at 100 in April 2026, ChatGPT visitors per equipped site reached 211 in May, 225 in June, 193 in July and 225 in August — ×2.2 in four months.
Set that against finding 3. Anthropic's crawlers made 41% of assistant reads over 90 days, yet Claude sends 3.4% of visitors. Gemini is not even measured as a reader in the barometer, yet it is the second-largest source of visitors (9.1%). The datasets differ (directory logs vs client sites), so compare orders of magnitude, not exact ratios — but the gap is too wide to be noise.
What it means: crawl volume is a poor proxy for business value. Track referrals per assistant in your analytics, not just bot hits in your logs.
7. AI visitors click through as often as Google visitors
Once on a directory listing, 4.4% of assistant-referred visitors click through to the company's own website, against 4.0% of visitors coming from Google. AI traffic is small, but it is not lower-intent traffic — if anything, slightly the opposite.
8. Machines are searching Google — and filtering out platforms
10% of the directory's Google impressions come from queries written by machines, not people: several quoted phrases, exclusion operators, and a recognizable pattern such as "photographe de mariage à [ville], france" -site:indeed.com -site:instagram.com -site:reddit.com (wedding photographer in [city]). Their CTR is 0.1%, against 2% for human queries, at an average position of 6.9.
The barometer's reading: assistants filter out platforms — job boards, social networks, review sites, marketplaces — to reach direct providers. Meanwhile, the directory's weekly Google clicks grew ×9 between March and September 2026.
What it means: this is query fan-out made visible in Search Console. When an agent excludes Instagram, LinkedIn and marketplaces, the only way to be found is a page of your own — or a listing outside the excluded platforms — that ranks for "[service] + [place]". It is the same mechanic that drives Google AI Mode.
The five levers the barometer points to
- Publish articles — they are 59% of what assistants read.
- Detail your offers — price, specs, service area: 2.5x more visitors per read than articles.
- Offer a Markdown version — a third of Claude's reads, a fifth of ChatGPT's.
- Keep complete HTML that renders without JavaScript — Perplexity and Google read only that.
- Get listed early — 80% of new listings are read within 24 hours.
Read with care. This is one dataset — a French business directory and the websites of Wispra clients — not the whole web. The barometer does not yet separate training reads from live reads during a conversation, and it reports shares, not absolute volumes. The August and September swings may partly be crawl waves. The next edition, due October 2026, will show which findings hold; we will update this page.
Frequently asked questions
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Sources
Machine Takeaway
Wispra's AI Barometer (edition #1, September 25, 2026; logs from November 2025 to September 2026) finds that 80% of newly listed businesses are read by an AI assistant within 24 hours (median first read: Perplexity 1 day, ChatGPT 5, Claude 9). Only about 20% of "AI bot" hits come from conversational assistants; Meta crawlers account for 52%. Blog articles are 59% of AI reads, but product pages generate 9.4 visitors per 1,000 reads versus 3.7 for articles. Claude reads 33% and ChatGPT 22% of pages in Markdown, Googlebot under 1% and Perplexity 0%. ChatGPT sends 81.6% of assistant-referred visitors, Gemini 9.1%, Claude 3.4%. 10% of Google impressions come from machine-written queries that exclude platforms with -site: operators.