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ChatGPT and AI traffic regex generator for GA4
Tick the AI assistants you care about and copy one GA4 regex for a custom AI channel.
AI assistants to include
Result
0Hostnames
0Characters
0Test matches
GA4 setup: Admin, Data display, Channel groups, Create new channel group, Add new channel, condition Source matches regex, paste the pattern, then reorder the channel above Referral.
The free chatgpt traffic regex ga4 runs in your browser, needs no sign-up and never sends what you type anywhere.
Quick answer
To track ChatGPT traffic in GA4, create a custom channel group with a channel such as AI assistants where Source matches a regex like ^(.*\.)?(chatgpt\.com|perplexity\.ai|gemini\.google\.com|copilot\.microsoft\.com|claude\.ai)$. Place it above Referral, because GA4 assigns each visit to the first channel whose rules it matches.
What is a ai referral traffic regex generator?
An AI referral regex generator is a tool that writes one regular expression matching the referral hostnames of AI assistants such as ChatGPT, Perplexity, Gemini, Copilot and Claude. GA4 regex is a full match by default, so the pattern lists each domain, escapes the dots and allows an optional subdomain such as www.
How do you use the AI Referral Traffic Regex Generator?
- Tick the AI assistants you want in the channel and add any extra hostnames you see in your own reports.
- Choose strict (full match for the Source dimension) or loose (contains style, for explorations and Looker Studio).
- Paste a few Source values from your Traffic acquisition report into the tester to confirm what matches.
- In GA4 open Admin, Data display, Channel groups, create a new group and add a channel with Source matches regex and the copied pattern.
- Move the AI channel above Referral, save the group and pick it as the primary dimension in Traffic acquisition.
How do I see ChatGPT traffic in Google Analytics 4?
Open Reports, Acquisition, Traffic acquisition, switch the primary dimension to Session source and search for chatgpt.com. OpenAI says ChatGPT adds utm_source=chatgpt.com to referral URLs, so these visits usually show chatgpt.com as the source. For an ongoing view, add a custom channel group using the regex from this tool.
Why put the AI channel above Referral?
GA4 puts each visit in the first channel whose definition it matches, in the order of the list. If Referral sits above your AI channel, visits from chatgpt.com or perplexity.ai match Referral first and never reach the AI channel. Google explains this in its custom channel groups help page.
Does GA4 regex need to match the whole value?
Yes, GA4 uses full match for regex by default, so chatgpt alone will not match chatgpt.com. Use .* or a full domain list with anchors, as this generator does. Channel definitions are not case sensitive, but report filters can be, so keep hostnames in lowercase.
Quick reference
| AI assistant | Typical GA4 source | Pattern part |
|---|---|---|
| ChatGPT | chatgpt.com (older: chat.openai.com) | chatgpt\.com|chat\.openai\.com |
| Perplexity | perplexity.ai | perplexity\.ai |
| Google Gemini | gemini.google.com | gemini\.google\.com |
| Microsoft Copilot | copilot.microsoft.com | copilot\.microsoft\.com |
| Claude | claude.ai | claude\.ai |
| DeepSeek | chat.deepseek.com | chat\.deepseek\.com |
Worked example
Example
Example: with ChatGPT, Perplexity, Gemini, Copilot and Claude ticked, the strict regex is ^(.*\.)?(chatgpt\.com|chat\.openai\.com|perplexity\.ai|gemini\.google\.com|copilot\.microsoft\.com|claude\.ai)$. Tested against 6 sample sources, it matches chatgpt.com, www.perplexity.ai, gemini.google.com and claude.ai, and correctly ignores google and facebook.com.
Learn more
Frequently asked questions
Is AI traffic counted as referral in GA4?
Yes, by default. GA4's default channel group has no AI channel, so visits from chatgpt.com or perplexity.ai land in Referral. A custom channel group with the regex from this tool moves them into their own AI channel in your reports.
Will Google AI Overviews traffic show up with this regex?
No. Clicks from AI Overviews and AI Mode come from Google Search, so GA4 reports them as google / organic, mixed with normal search clicks. Search Console includes them in the Performance report, but it does not separate them from other web results.
Is the custom channel group retroactive?
Yes. Google says custom channel groups can be applied to your reports retroactively, so you can see past AI visits once the group is saved. Audiences only use the new definition going forward.
Why do some AI visits show as direct traffic?
Some apps and browsers do not pass a referrer when a user taps a link, for example in certain mobile apps or when copying a link. Those visits arrive as direct / none and no regex can recover them. The real AI share is often a little higher than reported.
How many custom channel groups can I create?
A standard GA4 property can have 2 custom channel groups and a GA4 360 property can have 5, in addition to the default group. Each group can hold up to 50 channels, so one AI channel fits easily.
Does this tool connect to my Analytics account?
No. The generator and tester run entirely in your browser. Nothing is sent to Google Analytics or any server. You copy the regex and paste it into GA4 yourself.
Sources
Facts checked against these official pages. Read how I check facts in my editorial policy.
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