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# UTM tags vanish from ChatGPT links, muddying AI traffic attribution
- URL: https://www.medianexis.com/utm-tags-vanish-from-chatgpt-links-muddying-ai-traffic-attribution/
- Published: 2026-10-18T17:48:37.000Z
- Updated: 2026-10-18T17:48:37.000Z
- Description: AdExchanger reports that ChatGPT links have stopped carrying UTM parameters, so visits once tagged as AI-referred traffic are now showing up as direct.
- Author: The Signals Desk
- Tags: Measurement, AdExchanger: new ad metrics and UTM decline

**Why it matters.** Brands tracking AI visibility now have to infer ChatGPT-driven visits from behavioral signals instead of clean referral data.

*Signal from* [*adexchanger.com*](https://adexchanger.com/?ref=medianexis.com) *·* [*read the original*](https://www.adexchanger.com/daily-news-roundup/friday-16102026/?ref=medianexis.com)*.*