ChatGPT dropped its link tags for a week. AI visits read as direct

For about a week after OpenAI rolled out GPT-6 on Oct 7, 2026, links in ChatGPT answers arrived at your site with no tag and no referrer, so your analytics filed those visits under Direct. On Oct 15 it turned out to be a bug, and the tags are back. Most of the visitors never went anywhere. They lost their name tag for a week.

Search Engine Roundtable reported the missing tags on Oct 14, and Cedric Huesler at Adobe traced the mechanism in a LinkedIn post the same day. GPT-6 opened each link with noopener and noreferrer set, and it dropped the utm_source=chatgpt.com tag it used to add. With neither, nothing tells your analytics where the click came from.

OpenAI didn't announce a change. Its own Publishers and Developers FAQ on the OpenAI Help Center still says ChatGPT "automatically includes the UTM parameter utm_source=chatgpt.com in referral URLs." Cedric's sources told him it might be a bug, and SEO consultant Glenn Gabe said the same on X on Oct 15, after the last tags he could still find disappeared.

Then the fix. Cedric updated his post on Oct 15, and Search Engine Roundtable updated its report with his words: "Relieved. It was a bug. ChatGPT is tagging its links with utm_source=chatgpt(.)com again."

Cedric looked at about 500 pages where ChatGPT drove 5% or more of visits and compared Oct 9 to 13 with the week before. ChatGPT visits fell by 31k a day. Direct rose by 26k a day on the same pages, while search fell 7%, in line with everywhere else. Direct rose on 261 of the 387 pages that lost ChatGPT traffic. The week before, that was a coin flip.

The tag itself was gone too. Mehrab at SEO Mode has tracked ChatGPT answers daily since May. From May to early August, 97% of the links in those answers carried utm_source. From Oct 9 to his Oct 15 post, it was 0 out of 5,185. He also found that 89% of answers linked straight to a website, mostly the homepage.

Alex Yarosh, who runs the AI studio Base2026, pushed back on X: don't relabel your Direct bucket as AI growth. He's right, and it's the point. A referrer is a label someone else chose to send you. When they stop sending it, the report breaks. The buyer doesn't.

A buyer who reads your pricing page twice in a week is a buyer whether the referrer says ChatGPT or nothing at all. That's a signal: something a buyer just did, on your own site, that no one can strip off the link. Chris Hart, Civic's CEO, wrote this week that your buyer's AI does the research and a person comes to verify it. The verifying visit is the one to act on, and for a week it didn't say where it came from. That's the bet behind Bryn, by Civic: what buyers do on your own site is the signal you can't buy.

Start with the chart. Your ChatGPT line broke between Oct 8 and Oct 10 and should recover from Oct 15, so annotate the gap now, before someone reads the dip as demand falling. Then read ChatGPT and Direct together for that week, on the deep pages ChatGPT sends people to. Nobody types a pricing or docs URL by hand.

Then ask. Add "ChatGPT or another AI assistant" to the how-did-you-hear list on your demo form. Someone who researched with an assistant won't think to type it into a blank box. Give them the option.

• Cedric Huesler on LinkedIn, Oct 14, 2026
• Publishers and Developers FAQ, OpenAI Help Center, read Oct 15, 2026
• OpenAI Drops UTM Parameters From ChatGPT Results (GPT-6), Search Engine Roundtable, Oct 14, 2026, updated Oct 15
• Mehrab (@mehrab_build) on X, Oct 15, 2026
• Glenn Gabe (@glenngabe) on X, Oct 15, 2026
• Alex Yarosh (@AleksejAros) on X, Oct 15, 2026