GA4 has a Default Channel Group called AI Assistant. It counts visits that arrive from AI tools such as ChatGPT, Gemini, DeepSeek, Copilot and Grok, and you find it under Reports, Acquisition, Traffic acquisition. It does not count Google's own AI Overviews or AI Mode; those visits are filed under Organic Search, and their impressions are in Search Console instead. Here is how both work. I was reviewing GA4 data for Stackra on May 14 when I noticed a row in the Traffic Acquisition report that had not been there the week before. The channel group label read 'AI Assistant.' Google had shipped a dedicated channel for AI-driven traffic, and it first showed up in our reports on May 13, 2026. (Google's help page does not give a launch date.) This article covers what changed, what the new data actually shows, and how to find it in your own account.
What changed on May 13
For the past year, traffic arriving from ChatGPT, Gemini, Claude, and similar AI tools landed in your GA4 Referral channel. It was mixed in with random blogs, directory listings, and partner links, invisible unless you manually built regex filters to separate it. Most small business owners never did. As of May 13, Google elevated AI-driven traffic to its own Default Channel Group. The channel is called AI Assistant, and it now appears as a distinct row in your Traffic Acquisition reports without any configuration required on your end.
The three values to know
When GA4 classifies a session as AI Assistant traffic, three specific values appear in the underlying data. You will see these if you explore the channel group breakdown or add secondary dimensions to the report.
| Dimension | Value |
|---|---|
| Medium | ai-assistant |
| Default Channel Group | AI Assistant |
| Campaign Name | (ai-assistant) |
These values are set by Google's classification logic, not by UTM parameters from the AI tools themselves. Nothing needs to change on your site.
Which AI tools it covers
Google's definition says the channel is for visitors who arrive "from sources like ChatGPT, Gemini, Deepseek, Copilot, or Grok", and that it applies when the referrer matches Google's list of AI assistants. Google does not publish the full list, and its examples do not name Claude or Perplexity, so whether a visit from those lands here depends on whether it matches that list. A visit that arrives with no referrer at all cannot be attributed to any source and is counted as Direct.
The AI Assistant channel excludes Google's AI Overviews and AI Mode. Clicks from those count as Organic Search, alongside ordinary Google results.
Where Google's own AI answers show up: Search Console
Because AI Overviews and AI Mode count as Organic Search in GA4, the place to see them is Google Search Console. Its Generative AI report shows how many times your pages appeared in AI Overviews and AI Mode. It counts impressions only (no clicks), it has no API, so you download it by hand, and its data starts on July 14, 2026. The gap between the two can be large. For stackra.app, Search Console counted 4,707 AI Overviews and AI Mode impressions from July 14 to October 13, 2026, while GA4's AI Assistant channel recorded a single visit, from Gemini, between September 27 and November 8. GA4 also only sees visitors who accept cookies, so treat it as a floor.
If you want to know whether Google's AI answers show your site, look in Search Console. GA4's AI Assistant channel will not tell you.
How to find the AI Assistant channel in GA4
The steps are straightforward. You do not need to set up any filters or custom reports.
- •Open GA4 and select your property
- •In the left sidebar, go to Reports, then Acquisition, then Traffic Acquisition
- •In the first column (Default Channel Group), look for the row labeled AI Assistant
- •If the row is not visible, widen your date range to include May 13, 2026 or later. Traffic from before that date was not classified this way
- •A date range of May 13 to present gives you the cleanest view of what has come in since the channel launched
Why the number can look low
There is a limitation to understand before trusting the numbers. GA4 can only file a visit under AI Assistant when the visit carries a referrer it recognizes. When an app or browser opens your link without passing one, GA4 has nothing to attribute and counts the visit as Direct. Visitors who decline analytics cookies are not counted at all. The practical implication: your AI Assistant number is a floor, not the ceiling.
Read the AI Assistant channel as a minimum count of AI-referred visits, and Search Console's Generative AI report for Google's own AI answers.
What growing AI traffic tells you
If you see the AI Assistant channel and the numbers are growing, that is a concrete signal: AI tools are linking people to your pages when they answer questions your content covers. Look at which pages those visits land on. They tell you which answers of yours the tools are sending people to, and visitors who follow a recommendation in a conversation usually arrive knowing what they want.
If you are receiving zero AI Assistant traffic, that does not mean AI tools are ignoring you. Some AI visits land in Direct regardless, and Google's AI answers are counted elsewhere. But it is worth checking three things: whether the AI search bots can reach your pages at all, whether your key pages answer specific questions in plain text near the top, and whether your site states who you are, what you do and where you operate in words, not only in images. These are solvable problems and they are where the gap between 'AI never mentions me' and 'AI cites me regularly' usually lives.
Stackra checks AI crawler access, structured data and whether your content is readable without JavaScript in every scan. A scan takes a few minutes.
Official references
The two Google help documents that define the AI Assistant channel and the full default channel group taxonomy:
Frequently asked questions
Common questions about the GA4 AI Assistant channel and what the data means.
What is the GA4 AI Assistant channel?
The AI Assistant channel is a Default Channel Group in Google Analytics 4. It first appeared in our reports on May 13, 2026. It groups sessions where the visitor arrived from an AI tool whose referrer matches Google's list of AI assistants (Google's examples are ChatGPT, Gemini, DeepSeek, Copilot and Grok). It excludes Google's AI Overviews and AI Mode. Before this channel existed, that traffic was classified as Referral and mixed in with other sources with no easy way to separate it.
When did Google add the AI Assistant channel to GA4?
Google's help page does not give a date. In our account the channel first appeared on May 13, 2026, and our earlier AI visits stayed under Referral; they were not relabeled. If your date range ends before mid-May 2026, you will not see the channel.
Which AI tools does the GA4 AI Assistant channel track?
Google's definition gives ChatGPT, Gemini, DeepSeek, Copilot and Grok as examples and says the channel applies when the referrer matches its list of AI assistants. The full list is not published, and Claude and Perplexity are not named. Visits that arrive with no referrer are counted as Direct. Google's own AI Overviews and AI Mode are excluded and count as Organic Search.
Why does my AI Assistant traffic look lower than expected?
Three reasons. Visits that arrive without a referrer are counted as Direct. Visitors who decline analytics cookies are not counted at all. And Google's AI Overviews and AI Mode are not in this channel; they count as Organic Search, and their impressions are in Search Console's Generative AI report. Treat your AI Assistant number as a minimum count, not the full picture.
What is the difference between AI Assistant and Referral traffic in GA4?
Before May 13, 2026, traffic from AI tools was classified under Referral in GA4, alongside all other external links. The AI Assistant channel separates AI-tool traffic into its own group, making it possible to see trends without manual regex filtering. If you see a drop in Referral traffic and a new AI Assistant row appear on the same date, that is the reclassification happening, not a real traffic loss.
Does the AI Assistant channel include Google AI Overviews?
No. Google's definition says the channel excludes AI Overviews and AI Mode; clicks from them count as Organic Search. To see how often your pages appear in AI Overviews and AI Mode, use Search Console's Generative AI report, which counts impressions from July 14, 2026 onward.
Do I need to configure anything in GA4 to see AI Assistant traffic?
No. The AI Assistant channel is a Default Channel Group, which means GA4 applies it automatically based on how sessions arrive. You do not need to create custom channel groupings, add UTM parameters to your URLs, or install anything new. If your site received AI-attributed traffic after May 13, 2026, it will appear in the Traffic Acquisition report under Acquisition in the standard reports section.