Is ChatGPT already sending visitors to your site? How to measure it in GA4

Yes, ChatGPT traffic already shows up in Google Analytics 4, and you don't need to set anything up to start seeing it. GA4 has a default channel called AI Assistant, which groups visits from assistants such as ChatGPT, Gemini and Copilot. On the website of Sepat, one of our clients, chatgpt.com showed up among the traffic sources in August 2026, in the same report where 926 of the 1,375 sessions, about 67%, came from Google organic search.

The volume is still small next to Google, but it is a signal worth tracking now and one that deserves a line in your marketing planning for 2027. Below is where to find these visits, how to break them down in more detail and how to write so AI assistants cite you.

Where ChatGPT traffic shows up in GA4

The fastest route is the traffic acquisition report, grouped by the session's default channel. In Reports, open Acquisition and then Traffic acquisition. In the table, the AI Assistant channel shows the sessions that came from AI assistants.

According to Google's documentation on the default channel group, this channel includes visits with the medium “ai-assistant” and visits from a list of assistants, such as ChatGPT, Gemini, DeepSeek, Copilot and Grok. Google's own AI Overviews and AI Mode are excluded and stay in Organic Search.

Switch the dimension to Session source / medium and the detail appears. In Sepat's report, the line read “chatgpt.com / ai-assistant”, just below the organic and social sources.

Two things to keep in mind when reading it:

• some visits arrive as direct. When someone copies the link from an answer or opens the page from an app, the browser doesn't always say where the person came from;
• assistants missing from Google's list show up as referrals. Look for their domains in Session source / medium, with the medium “referral”.

How to create a dedicated channel for AI

A custom channel group puts every assistant that matters to your business in one place and leaves the analysis ready for the monthly report. The default channel covers the basics; a custom one lets you add new assistants, split them up and keep the same rule over time.

Following GA4's help page on custom channel groups:

1. In Admin, open Data display and then Channel groups.
2. Click Create new channel group, which copies the default group.
3. Give it a name, such as “Channels with AI”, and add an “AI assistants” channel with a source rule that matches the domains of the assistants you want to track.
4. Under Reorder, place this channel above Referral, because GA4 assigns each session to the first channel whose rule it matches.
5. Click Save group.

The same page says a custom group also applies to historical data and that a standard property can have two groups in addition to the default one. Choose the name and rules carefully before creating it.

What this visitor is looking for

Someone arriving from an AI assistant has already asked a question, read an answer and clicked to check the source. It is a different visit from a regular search: the person lands straight on a specific page, often an article or a service page, and wants to go deeper into what the AI summarized.

So look at three things in this channel's sessions:

• landing pages, which show which content the assistants are citing;
• engagement time, compared with organic search;
• conversions, to know whether these visits become contacts or just read.

This view helps separate content that attracts curious readers from content that attracts people already evaluating a solution, as we explain in awareness levels.

How to write so AI assistants cite you

Assistants cite pages that answer the question directly, in an organized way and with sources. The structure that works for Google works here too:

• the answer in the first paragraph, in a sentence that stands on its own;
• subheadings that read like real questions and lists for anything that can be listed;
• data with the source linked, so both the AI and the reader can check it;
• frequently asked questions at the end, with short answers;
• a visible update date on content that changes over time.

This article follows that structure. To see how AI fits into the team's day-to-day work, not just traffic, read our piece on AI in marketing. Building and maintaining this kind of content is at the heart of our content marketing and SEO work.

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Monthly tracking

One line in the monthly report is enough to follow the trend in ChatGPT traffic. Every month, write down:

1. sessions from the AI channel and the change against the previous month;
2. that channel's share of the total, next to organic search;
3. the five landing pages most visited from that channel;
4. the conversions that channel generated.

Add these numbers to the marketing metrics leadership already follows. In a few months, you will know whether the channel is growing, which pages it prefers and whether it brings in contacts.

Frequently asked questions

Is ChatGPT taking traffic away from Google?

It depends on the site, and your GA4 answers that better than any forecast. On Sepat's website, in August 2026, Google organic search still brought in about 67% of sessions, and chatgpt.com appeared as one more source.

Why does some ChatGPT traffic show up as direct?

Because not every visit arrives with source information. When the link is copied or opened from an app, GA4 may not know where the person came from and classifies the session as direct.

Do Google's AI Overviews count in the AI Assistant channel?

No. According to Google's documentation, AI Overviews and AI Mode are excluded from that channel and counted as Organic Search.