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Image Credit: State of Brand

Growth & Strategy

ChatGPT Traffic Looked Like It Collapsed Last Week. It Was a Bug, and It Should Still Worry You.

Q: What is State of Brand?

State of Brand is a trade publication covering brand strategy and category positioning for CMOs, brand strategists and marketing leaders. We report on the ideas, people and developments shaping brand strategy, category positioning, and how brands hold meaning as media fragments, with a particular focus on perspectives from the executives, operators and subject matter experts doing the work firsthand. Our readership is global and includes professionals at Fortune 500 companies and leading organizations across brand and marketing. Our goal is to give practitioners a useful place to learn from their peers and give experts a credible platform to contribute their experience to important industry conversations.

Q: Who do you interview, and why was I invited?

We regularly speak with senior executives, operators, practitioners, researchers and other subject matter experts whose experience is relevant to the topics we cover. Our editorial team proactively identifies potential contributors based on their professional expertise, experience and perspective. You do not need to be a customer of, partner to, or otherwise affiliated with any company to participate. Interviews are designed to surface useful firsthand perspectives rather than promote a product or company. For participants, they provide an opportunity to contribute to the conversation around their field, share lessons from their work, and build a published body of thought leadership around the subjects they know best. There is no fee to participate.

Q: Who publishes State of Brand?

State of Brand is published by Outlever, which produces it as one of its own media properties rather than on behalf of an outside sponsor. The articles and interviews are produced by the State of Brand editorial team. Experts are invited because their perspectives are relevant to our coverage, not because they have paid to appear. An interview invitation from State of Brand should therefore be understood as an invitation to contribute expertise to an editorial trade publication — not as a sales solicitation or paid placement.

Q: Where will my interview appear, and who will see it?

Your interview will be published on State of Brand, where it becomes part of our ongoing coverage of brand strategy and category positioning and can continue to be discovered and referenced after publication. Our audience includes CMOs, brand strategists and marketing leaders at organizations around the world, including professionals at Fortune 500 companies and other leading enterprises. We also make interviews easy to extend through professional networks. Contributors receive a shareable article link and professionally designed quote-card asset that can be used on LinkedIn, and stories may receive additional amplification through the publication, contributor networks and relevant professional communities. For many contributors, the value is not simply appearing in one article. It is having their expertise captured in a credible editorial format that can be shared with colleagues, customers, peers and their broader professional network.

ChatGPT’s AI referral traffic appeared to crash in October. It was a tracking bug, and it shows how little of AI search measurement marketers actually control.

ByState of Brand Editorial

Oct 20, 2026

For about a week, ChatGPT stopped labeling the visits it sent to websites, and marketers' AI traffic appeared to fall off a cliff. The visitors kept coming, but the episode is a reminder of how little of AI search marketers actually control.

If you opened your analytics dashboard last week and found that half of your ChatGPT traffic had disappeared, you weren't alone, and you probably hadn't done anything wrong.

Starting around October 9, as OpenAI rolled out GPT-6, links in ChatGPT's answers stopped carrying the utm_source=chatgpt.com tag that tells analytics tools where a visitor came from. Many also arrived without a referrer. With neither signal, Google Analytics and similar tools filed those visits as "Direct," the bucket for traffic nobody can explain. ChatGPT's line on the dashboard dropped, and Direct rose by roughly the same amount on the same pages.

According to Adobe's Cedric Huesler, OpenAI told him on October 14 that the missing tag was a known bug, and a fix began rolling out the next morning. OpenAI hasn't said anything publicly, and its release notes don't mention it.

Where the missing visits went

The size of the drop depended on who was counting. LLM Pulse found ChatGPT referrals fell about 46% in two days across the sites it monitors, while total traffic stayed flat and referrals from Perplexity and Claude didn't move. Graphite saw ChatGPT-attributed sessions in GA4 drop by anywhere from 22% to 57%, Search Engine Journal reported. Huesler looked at about 500 pages where ChatGPT normally drove at least 5% of visits and found ChatGPT down roughly 31,000 visits a day, with Direct up about 26,000 on the same pages, according to Search Engine Roundtable.

Mobile was hit hardest. Graphite said 95% of mobile ChatGPT visits to its sites had been identified by the tag alone, since the app rarely passes a referrer.

By the morning of October 15, tagged ChatGPT clicks were back to between 95% and 100% of normal across thousands of domains tracked by Peec AI. The week before that is gone for good, though. Visits that arrived unlabeled stay unlabeled, and every report covering October 8 through 15 now understates ChatGPT and overstates Direct.

Marketers are measuring AI search through a keyhole

At State of Brand, we're less interested in the fix than in how fragile the whole arrangement turned out to be. We'd go further: AI referral traffic was never a solid number to build a strategy on, and last week proved it.

For most marketers, the main way to see ChatGPT in their analytics is a tag that OpenAI chooses to add to its links. Huesler says most ChatGPT clicks still arrive without a referrer even now, which leaves the tag carrying almost all the weight. One company controls it, and a change to how links open went out with a major model launch without any announcement. Nobody outside OpenAI noticed until the charts broke.

Think about who was looking at those charts. Marketing teams are spending more on AI visibility, and CEOs increasingly want to see what it returns. A CMO who walked into a budget review last week with a slide showing ChatGPT traffic down by almost half would have been wrong, and nobody in the room would have known it.

Paid traffic, by the way, came through fine. According to Peec AI's analysis, clicks from ChatGPT Ads that carry an advertiser's own tracking tags weren't affected. So marketers could see every visit they bought from ChatGPT last week and lost sight of many of the ones they earned. Google's Gemini went the other way a few weeks ago and started adding tracking tags to its links. That's welcome, but it's still a choice another company makes for you.

Our take

Start with housekeeping. Mark October 8 through 15 in every report your team keeps, and keep that week out of year-over-year comparisons and anything headed to the board.

Then stop treating AI referral traffic as a headline number. It's useful, but OpenAI decides whether you can see it, and it can change that during any product launch. Put it next to signals your company actually controls. Branded search is one; Businessmap's Nikolay Tsonev told us he now tracks it instead of website traffic. A simple "How did you hear about us?" field on demo forms is another, and one of the few ways to hear about AI's influence straight from the buyer. Add direct traffic on the pages AI tends to cite, and pipeline from accounts you've never touched before.

The longer-term fix is owning more of the relationship. An email list, a community or a publication your buyers read on purpose can't be relabeled by someone else's code change. The more of your audience you reach directly, the less a week like this one can distort what you know.

ChatGPT will probably break your dashboard again. Build reporting that still makes sense when it does.

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Frequently Asked Questions

What is State of Brand?

State of Brand is a trade publication covering brand strategy and category positioning for CMOs, brand strategists and marketing leaders.

We report on the ideas, people and developments shaping brand strategy, category positioning, and how brands hold meaning as media fragments, with a particular focus on perspectives from the executives, operators and subject matter experts doing the work firsthand.

Our readership is global and includes professionals at Fortune 500 companies and leading organizations across brand and marketing. Our goal is to give practitioners a useful place to learn from their peers and give experts a credible platform to contribute their experience to important industry conversations.

Who do you interview, and why was I invited?

We regularly speak with senior executives, operators, practitioners, researchers and other subject matter experts whose experience is relevant to the topics we cover.

Our editorial team proactively identifies potential contributors based on their professional expertise, experience and perspective. You do not need to be a customer of, partner to, or otherwise affiliated with any company to participate.

Interviews are designed to surface useful firsthand perspectives rather than promote a product or company. For participants, they provide an opportunity to contribute to the conversation around their field, share lessons from their work, and build a published body of thought leadership around the subjects they know best.

There is no fee to participate.

Who publishes State of Brand?

State of Brand is published by Outlever, which produces it as one of its own media properties rather than on behalf of an outside sponsor.

The articles and interviews are produced by the State of Brand editorial team. Experts are invited because their perspectives are relevant to our coverage, not because they have paid to appear.

An interview invitation from State of Brand should therefore be understood as an invitation to contribute expertise to an editorial trade publication — not as a sales solicitation or paid placement.

Does it cost anything to be interviewed or featured?

No. There is no fee to participate in an interview or to be featured in State of Brand.

We do not charge executives, subject matter experts, or their companies for editorial coverage. There are no placement fees, participation fees, required subscriptions, or other payments associated with being interviewed or included in an editorial feature.

Our editorial team invites contributors because their experience, expertise, or perspective is relevant to the subjects we cover — not because they have paid for exposure.

State of Brand is published by Outlever, which allows the publication to produce ongoing reporting and interviews without charging the experts who contribute to our coverage.

Participation also does not require you or your organization to purchase anything from, become a customer of, or enter into a commercial relationship with anyone.

If you have been invited to speak with State of Brand, the invitation is for an editorial interview at no cost to you or your organization.

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A member of the State of Brand editorial team will conduct a brief conversation, typically around 20 minutes, focused on the subject where your experience is most relevant. We then develop the conversation into an editorial feature for the publication.

Before publication, participants are given an opportunity to review the article and flag factual inaccuracies, quotation issues or important context that should be clarified.

Our goal is to accurately represent your perspective while keeping the process lightweight for busy executives and subject matter experts.

Where will my interview appear, and who will see it?

Your interview will be published on State of Brand, where it becomes part of our ongoing coverage of brand strategy and category positioning and can continue to be discovered and referenced after publication.

Our audience includes CMOs, brand strategists and marketing leaders at organizations around the world, including professionals at Fortune 500 companies and other leading enterprises.

We also make interviews easy to extend through professional networks. Contributors receive a shareable article link and professionally designed quote-card asset that can be used on LinkedIn, and stories may receive additional amplification through the publication, contributor networks and relevant professional communities.

For many contributors, the value is not simply appearing in one article. It is having their expertise captured in a credible editorial format that can be shared with colleagues, customers, peers and their broader professional network.

Where the missing visits went

Marketers are measuring AI search through a keyhole

Our take

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