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AI answers keep adding ads. Early data says ChatGPT's earn about a third of search.

Google showed four ads under a single AI Mode answer, a working paper put a dollar figure on a paid ChatGPT visit, and Reddit said it will test a login-only site after its search referrals fell.

By Matt Lawler, President and CEO6 min read

This week in one line

Set ChatGPT ad bids from what a visit there earns you, not from your search CPC, because an early study says it earns about a third as much.

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012 items

Major LLM & Model Developments

Mistral released the weights for a trillion-parameter model you can run yourself.

Why it matters

A large open model is one more way to keep customer data inside your own stack.

Mistral put the open weights for Mistral Large 4 on Hugging Face under its own modified MIT license, and model-as-a-service providers need a commercial license. It has 1 trillion total parameters with 49 billion active, a 1 million token context window, and reads text and images, according to VKTR. API pricing is $0.70 per million input tokens and $2.10 per million output tokens.

SourceVKTR, Oct 29

OpenAI rewrote the rules its models follow.

Why it matters

If your team runs prompts or brand-voice workflows on GPT, retest them. Some defaults changed.

OpenAI reorganized its Model Spec around five values, including faithfulness to human intent, honesty and human agency. The update adds guidance on reading context and oversight, adjusts some defaults and retires most of its detailed style guidance. OpenAI says its models "do not yet fully reflect it."

SourceLet's Data Science, Oct 29

023 items

User-Centric Use Cases & Features

ChatGPT can refuse to open your site, and your logs won't show it.

Why it matters

A clean crawl report doesn't prove ChatGPT can reach your pages.

A Search Engine Journal contributor describes a site-safety check, named Aura in OpenAI's code, that can stop ChatGPT search and OpenAI's agents from opening a flagged site even when robots.txt allows them. There's no self-serve review or formal appeal, so the author recommends documenting the block and opening a support case. The account rests on one publisher's case, and OpenAI's public docs don't name Aura.

SourceSearch Engine Journal, Oct 29

OpenAI's three bots need three separate checks.

OpenAI documents OAI-SearchBot for search, GPTBot for training data and ChatGPT-User for actions a person triggers. OpenAI says robots.txt rules "may not apply" to those user-triggered requests, TechWyse reports. A successful crawl by one bot doesn't prove ChatGPT's browser can open the page.

SourceTechWyse, Oct 30

ChatGPT ads got a wider card and multi-image ads.

Why it matters

Your existing creative is starting to run at a new size without anyone on your team touching it.

OpenAI told advertisers it's rolling out a wider standard ad card that uses more of the conversation width on desktop, built from existing campaigns and creative. Multi-image ads are now in open beta for all advertisers. Search Engine Roundtable puts ChatGPT Ads in 89 countries.

SourceSearch Engine Roundtable, Oct 30

034 items

Industry Trends & Policy Signals

Google showed four ads under one AI Mode answer.

Why it matters

Google told investors it will show "more ads, more often" in AI Mode. This is what that looks like.

A screenshot shared through Search Engine Watch showed four ads under an AI Mode answer for a single query. Search Engine Roundtable's Barry Schwartz says one or two is typical, sometimes three. The post carries no word from Google on whether four is a test.

SourceSearch Engine Roundtable, Nov 4

An early study says a paid ChatGPT visit earns shops $0.89. A paid Google search visit earns $2.45.

Why it matters

If a click there is worth about a third of a search click, your search CPC is the wrong place to start your bid.

Researchers at Vienna University of Economics and Business and Frankfurt School of Finance & Management tracked 102 advertiser sites with full sales data. In US traffic, paid ChatGPT visits converted at 0.37% against 1.17% for paid Google search, and the authors put ChatGPT's break-even price at about $0.26 per click. The working paper isn't peer reviewed and relies on last-click data.

SourceSearch Engine Journal, Nov 2

Google told investors AI Mode earns it less, and Alphabet had its worst trading day on record.

Why it matters

Google's answer is to scale ads inside AI Overviews and AI Mode, so expect more of them.

On the Q3 call, chief business officer Philipp Schindler said fast growth in AI Mode queries weighed on revenue because of "lower monetization we were seeing in AI Mode." Search and other revenue grew 12% to $63.35 billion, its slowest rate of 2026. Alphabet's Class A shares fell 12.6% on October 29, their worst day since trading began in 2004, according to PPC Land.

SourcePPC Land, Nov 4

Reddit will test a login-only site after its search referrals fell.

Why it matters

Open forum content that search engines and AI tools read is getting harder to reach.

Reddit said search traffic dropped by more than 1 million referrals a week on average in October, and CEO Steve Huffman named Google's AI Overviews and AI Mode as the main suspect. Its US daily active uniques fell from 53.2 million to 50.7 million. Reddit will test a logged-in-only version of the site in select markets outside the US this quarter.

SourceSearch Engine Journal, Oct 30

04 · Decisions

Strategic Takeaways for Marketing Leaders

Three calls we'd make this week if we ran your marketing.

Decision 01

Bid on ChatGPT from your own revenue per visit, not your search CPC.

One study puts a paid ChatGPT visit at about a third of a paid search visit. Cap bids at what your ChatGPT traffic actually earns, and raise them only when the numbers do.

Decision 02

Check that ChatGPT can open your site, not just crawl it.

OpenAI's bots follow different rules, and a block can sit on OpenAI's side or on your own server. Test your key pages inside ChatGPT the way a buyer would.

Decision 03

Track ads in AI answers the way you track rankings.

Google's fix for weaker AI Mode revenue is more ads in it, up to four under one answer so far. Log which of your buyer questions show ads now, so you see the change as it happens.

05 · Actions

What CMOs Should Do This Week

Each one is small enough to finish this week.

LVL3 data

37 of 464

Home services websites whose server refused at least one AI crawler

From our data

The Aura block happens on OpenAI's side, where you can't see it. The other kind happens on your own server. In the LVL3 Home Services Growth Index, up to 37 of 464 company websites refused at least one AI crawler in our tests, most often through a firewall or security default. Only 13 blocked one in robots.txt. Check your server's bot rules before you blame OpenAI.

Read the Growth Index
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From our dataThe Home Services Growth Index 2026Read the reportShort answerHow to get cited by ChatGPTRead the answer

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