To track AI traffic in GA4, start with the new AI Assistant channel, then add a few checks for the visits it misses. GA4 now labels clicks from ChatGPT, Gemini, Copilot and others automatically, but app clicks, older data and Google's own AI features slip past it. This guide shows where each AI visit lands, how to build a report that catches them all and what a normal amount looks like.
On May 13, 2026, Google added an AI Assistant channel to GA4's default channel group. Google's release notes describe it as a dedicated way to measure traffic from popular AI assistants. You don't need to install or change anything to get it.
Google's channel definitions say the channel covers visits from sources like ChatGPT, Gemini, DeepSeek, Copilot and Grok. When GA4 recognizes one of these referrers, it sets the medium to "ai-assistant" and the campaign to "(ai-assistant)". Those visits then appear as their own line instead of being buried in Referral.
To see it, open Reports, then Acquisition, then Traffic acquisition. The table groups sessions by Session primary channel group, so AI Assistant sits next to Organic Search, Direct and Referral. Click it to see which assistants sent the visits.
ChatGPT makes this easier still. OpenAI's publisher FAQ says ChatGPT automatically adds utm_source=chatgpt.com to the links it shares. That tag tells GA4 exactly where the visit came from, even when the browser hides the referrer.
The channel has one big limit: it starts from the day Google switched it on. Visits from earlier months were recorded under Referral, so a year-over-year comparison needs the custom report described below.
The AI Assistant channel catches the cleanest case: someone clicks a link in an assistant on the web. Plenty of AI-driven visits don't arrive that way. They land in three other places, and each one needs a different check.
The biggest blind spot is Google itself. Google's guide to AI features and your website says clicks from AI Overviews and AI Mode count as ordinary web search traffic. In GA4, they show up as google / organic, mixed in with every other Google click.
The second gap is mobile apps. When someone taps a link inside certain AI apps, the visit can arrive without a referrer, and GA4 files it under Direct. You can't label these visits, but a rise in Direct sessions landing on deep pages, such as blog posts, is a strong clue.
The third gap is older visits and newer tools. Visits from before mid-May 2026 still sit in Referral, and so do visits from assistants Google hasn't added to its list yet. A simple filter, shown in the next section, brings them back into view.
At a glance
How to find each kind of AI traffic in GA4
Source: Google Analytics Help and Google Search Central.
The built-in channel covers day-to-day checks. For older visits, newer tools and conversions, set up the report below once. It takes about 15 minutes and works on any standard GA4 property.
1. Check that the AI Assistant channel shows data. Open Traffic acquisition and set the date range to the last 28 days. If AI Assistant is missing, your site may simply have no assistant visits yet, so check again next month.
2. Build an exploration that catches every AI source. Go to Explore, start a Free form report and add Session source as a dimension. Add a filter where Session source matches this regex: chatgpt|openai|gemini|copilot|perplexity|claude|deepseek|grok.
3. Add landing pages and key events. Add Landing page as a second dimension and Key events as a metric. This shows which pages AI tools send people to and whether those visits become calls, form fills or sales. To choose your key events, see our guide to GA4 key events for small businesses.
4. Save a custom channel group for long-term trends. In Admin, open Data display, then Channel groups, and create a new group from a copy of the default. Add an "AI (all sources)" channel that uses the same regex, and move it above Referral.
5. Check Google's AI features in Search Console. GA4 can't separate AI Overviews or AI Mode from regular Google clicks. Watch the Search Console Performance report instead, using our weekly Search Console check.
Step 4 matters more than it looks. Google says custom channel groups can be applied to your reports retroactively, so your AI line covers months before May 2026. Standard properties get two custom channel groups, so don't spend them on experiments.
Review the numbers monthly, not weekly. AI visits are small and uneven for most small businesses, and a weekly view mostly shows noise. Add the AI line to your monthly marketing scorecard so you see the trend every month.
Expect a small number. Conductor's 2026 AEO/GEO Benchmarks Report, based on 13,770 domains, finds AI referrals make up 1.08% of all website traffic. ChatGPT sends 87.4% of that AI traffic.
The share varies a lot by industry. In the same report, IT sites get 2.80% of their traffic from AI, while utilities get 0.35%. So compare your site with its own results from last month, not with the average.
Small doesn't mean unimportant. Microsoft Clarity's study of 1,277 publisher and news sites finds AI visitors sign up at 1.66%, against 0.15% for search visitors. Judge AI traffic by key events per session, not by session count.
If the number is near zero, check that you aren't blocking AI crawlers by accident. OpenAI says sites need to allow its OAI-SearchBot crawler to show up in ChatGPT search answers. Then work on being the business AI tools mention, which our guide to getting recommended by AI search covers in detail.
Do this today: open Traffic acquisition in GA4, find the AI Assistant row and note this month's sessions and key events. Those two numbers are your baseline for every AI search change you make next.
Yes. Since May 13, 2026, GA4 groups visits from ChatGPT, Gemini, Copilot and similar assistants into an AI Assistant channel. ChatGPT also adds utm_source=chatgpt.com to its links, so those visits are easy to identify.
Open Reports, then Acquisition, then Traffic acquisition, and look for the AI Assistant row in the channel table. For visits before mid-May 2026, filter Session source in an exploration for names like chatgpt, gemini and perplexity.
Some clicks from AI mobile apps arrive without a referrer, so GA4 can't tell where they came from. Those visits land in Direct. Watch for Direct sessions that land on deep pages, such as blog posts, as a sign of hidden AI traffic.
No. Google counts clicks from AI Overviews and AI Mode as regular web search traffic, so GA4 reports them as google / organic. Search Console counts them in its Performance report, under the Web search type.
About 1% on average. Conductor's 2026 benchmarks report finds AI referrals make up 1.08% of website traffic, with ChatGPT sending 87.4% of it. The share is higher in IT and lower in sectors like utilities.
