How to see ChatGPT traffic in Google Analytics 4

GA4 now has an AI Assistant channel for people who click through from ChatGPT, Gemini, Claude and other assistants. That is the visit at the end of the conversation. Here is where to find it, how to split it by assistant, and what it leaves out.

Checked on 11 November 2026

Find the AI Assistant channel

Google added an AI Assistant channel to GA4's default channel group. A session lands there when its medium is ai-assistant, which GA4 sets when the source is on its list of AI assistants, such as ChatGPT, Gemini, DeepSeek, Copilot and Grok.

Open Reports > Acquisition > Traffic acquisition.
Keep the table on Session primary channel group (Default channel group).
Find the AI Assistant row: its sessions, engaged sessions and key events are your click-through traffic from AI.
To see which assistant sent each visit, add the secondary dimension Session source.

Split the visits by assistant

Session source shows chatgpt.com, perplexity.ai, claude.ai, gemini.google.com and so on. To keep one view with only the assistants, build an exploration: Explore > Blank, add the Session source dimension and the Sessions and Key events metrics, and a filter on Session source that matches this regular expression:

.*(chatgpt|openai|perplexity|claude|gemini|copilot|deepseek|grok|meta\.ai).*

If your property does not show the AI Assistant channel, or you want Perplexity and Claude as channels of their own, create a custom channel group under Admin > Data display > Channel groups > Create new channel group. Put the AI channels above Referral: GA4 assigns each session to the first channel it matches. Standard properties can have two custom groups, and they apply to past data too.

What GA4 cannot see

The agents themselves. When someone asks ChatGPT, Claude or Perplexity about your product, the assistant fetches your pages from its own servers. Those fetches never run GA4's script, so they never show up, even when there are thousands a month.
Clicks that lose their source. Links opened from desktop and mobile apps often arrive with no referrer and land in Direct. In October 2026, for about a week, ChatGPT links stopped carrying utm_source=chatgpt.com: sites saw ChatGPT referrals fall and direct traffic rise by almost the same amount.
Google's own AI answers. Clicks from AI Overviews and AI Mode come from google.com and count as Organic Search, not AI Assistant.
Impostors. Any program can call itself ChatGPT in its user agent. GA4 does not check.

See the whole AI journey

Knocklog reads the requests themselves, on any host, so it sees what GA4 cannot: which assistants read which pages, whether each one was the real one, and the visits and leads they sent afterwards. The two work together: GA4 keeps measuring sessions, and Knocklog shows the part that happens before the click.

See which AI agents read your site

The check is free and needs no sign-up.