Edited by Paul Derrington, Chief Editor
TL;DR
OpenAI switched on advertising in ChatGPT in 26 more countries on October 21, taking the total to 89. More than 100,000 advertisers have run campaigns since the February US test, and the company says the ads business reached a $1 billion annualized revenue run rate in under 200 days. Ads appear only on the Free and Go plans - paid Plus, Pro and Enterprise users stay ad-free.

The expansion: 26 new markets
OpenAI announced the expansion on October 21, 2026, extending ChatGPT Ads from 63 to 89 countries. The biggest block is Latin America: following earlier launches in Mexico and Brazil, OpenAI is bringing ads to 14 more countries in the region, naming Argentina, Chile, Colombia and Peru. The rest of the world gets one sentence: more markets across Europe, the Middle East, Africa and Asia, including Nigeria, South Africa, Serbia, Ukraine, Cambodia, Bangladesh and Pakistan.
Advertisers in the new markets can buy through technology partners or self-serve through OpenAI's Ads Manager. The rule on who sees ads is unchanged: only Free and Go plan users get advertising. Plus, Pro and Enterprise subscriptions remain ad-free.
A $1B business in under 200 days
The speed of the ads business is the real story. OpenAI's engineering post, published the same day as the announcement, says ChatGPT Ads reached a $1 billion annualized revenue run rate in less than 200 days from launch. That is a run rate, not booked revenue, and OpenAI publishes no breakdown by market or buying route. Reuters reports the figure was first stated in August; CNBC reported in March that it had passed $100 million.
Scale numbers come straight from OpenAI: more than 1.2 billion people use ChatGPT each week, and over 100,000 advertisers have run campaigns in the eight months since the US test began on February 9. Reuters frames the expansion as a revenue push ahead of a potential IPO. Our read: OpenAI is trying to show it can make money from the hundreds of millions of people on its free and low-cost plans.
Under the hood: an LLM runs the ad flow
OpenAI's engineering post describes a stack built for conversation rather than search. A custom, post-trained frontier LLM - the team calls it the orchestrator - reads the conversation, rewrites it into commercial-intent queries, pulls candidate ads from semantic indexes, filters them for eligibility, and nominates candidates for an auction. The orchestrator does not set the price and does not pick the winner.
Three design choices matter. The ads session is stateful: it remembers context across turns and across conversations, so intent that develops over several messages can be matched. The ad flow runs in its own service with its own models and code, so ChatGPT's answer has no dependency on it - if the ad system is slow or down, the answer still arrives, and returning no ad is described as "an ordinary, successful outcome". And OpenAI restates its ads principles: conversations stay private from advertisers, customer data is not sold, ads are labeled and separate from answers, and advertising does not influence what ChatGPT says.
Why it matters
For businesses, ChatGPT is becoming a serious paid channel: 89 countries, self-serve buying, and an ad system that matches intent across a whole conversation rather than a single query. For everyone else, the trade is now explicit and global - free and low-cost access, with ads as the price, while Plus, Pro and Enterprise subscribers keep the clean product.
Watch the next phase. OpenAI says it will add formats, objectives, buying options and measurement, and is exploring more native ways for businesses to interact with users inside ChatGPT. Reuters notes ads began testing in the US earlier this year, AI-powered tools for advertisers arrived in September, and business-sponsored agents are already being tested with select US advertisers. The $1B milestone was step one; the ad product is still early.