How to Filter Out AI Traffic in GA4
AI tools like ChatGPT, Google Gemini and Perplexity are fast becoming part of how people discover websites. Instead of searching Google directly, users are asking AI tools questions – and sometimes, those tools recommend your site.
Here’s the catch: GA4 doesn’t yet have a neat “AI traffic” channel. If you don’t filter it out (or isolate it), AI referrals get lumped into referrals or organic search, making it difficult to measure the impact.
But there’s a workaround. In this episode, I’ll show you how to create a custom segment in GA4 to track traffic coming from AI tools.
Step 1: Open GA4 Explorations
Log in to your GA4 property
In the left-hand menu, click Explore
Click + Create new explorationStep 2: Build a Segment for AI Tools
In your new exploration, click Add segment
Choose Session segment
Under Condition, select Session source/medium
Change the match type to matches regex
Paste in the following regex and click save:(chatgpt|openai|anthropic|deepseek|grok).com|(gemini|bard).google.com|(perplexity|claude).ai|(copilot.microsoft|edgeservices.bing).com|edge\scopilot
This regex captures traffic from:
ChatGPT (when it links to your site)
Google Gemini
Perplexity search
Claude’s browsing
Bing Copilot
You.com AI search
Anthropic and DeepSeekStep 3: Create Two Segments
For the most useful insights, create both:
AI Tool Traffic – shows only visits from AI tools
Exclude AI Tools – filters them out so your “traditional” traffic analysis isn’t skewedStep 4: Analyse the Behaviour
Once applied, you can compare:
How AI-referred users behave vs. search users
Whether they bounce faster or stick longer
If they convert at a higher or lower rateWhy This Matters
It’s a whole new channel of discovery that didn’t exist two years ago. Your attribution models don’t yet account for AI referrals – but with this setup, you can start measuring it today and stay ahead of the curve.
Want help setting this up or interpreting the results? Get in touch with our team at Aston Digital.