ChatGPT ads in Vietnam: who can buy them, what they cost, and whether a market entrant should test them

ChatGPT began showing ads in Vietnam on 23 September 2026. For a company planning its entry, the existence of the channel is the least useful fact about it. The questions that change a plan are narrower: which legal entity can buy the ads, what an account costs before it teaches you anything, which categories are barred outright, and how to tell a working channel from a flattering report.

Everything below is taken from OpenAI’s own announcement, help pages and advertising policy as they stood on 11 October 2026. The product is in beta and changes month by month.

What launched in Vietnam, and who sees the ads

OpenAI’s announcement of 23 September 2026 started the rollout across Indonesia, Malaysia, the Philippines, Singapore, Thailand, Vietnam and Taiwan, following earlier launches in Australia, New Zealand, Japan, South Korea and India. That took ChatGPT ads to more than 60 countries.

Ads appear only for users on the Free and Go plans. Plus, Pro, Business, Enterprise and Edu accounts have none, and neither do accounts identified as belonging to people under 18, or Temporary Chats. Free users can also switch to an ad-free experience in exchange for lower message limits.

An ad sits below the end of a response, labelled as sponsored and visually separate from the answer. It is not placed next to conversations about personal health, mental health or politics. To choose an ad, the system reads the context of the current conversation, the ad’s landing page and copy, the “context hints” the advertiser supplies and, where the user allows personalisation, signals from their wider use of ChatGPT. When several ads qualify, relevance and bid together decide the order. Advertisers never see the conversations; they receive aggregated figures such as views and clicks.

Beyond the standard ad of title, copy, image and landing page, retailers can build ads from a product feed, which OpenAI says have been among the strongest performers on the platform. Users can also message an advertiser through an ad, and the advertiser then sees only the messages sent to it.

How many people in Vietnam will see these ads is not published. OpenAI gives a global figure of more than 1 billion weekly users and no country breakdown. The nearest public signal is Statcounter, which counts visits that AI chatbots send to the websites it tracks. In Vietnam, ChatGPT’s share of those referrals was about 67% in September 2026, down from about 92% a year earlier, while Gemini rose from about 3% to about 27%. That is a share of referrals between chatbots. It is not a user count, and it says nothing about how many people are on the plans that carry ads.

Who can buy: the entity rule and the home-country rule

Two rules in OpenAI’s help pages decide how a foreign company gets in.

The first is the entity rule. To use self-serve Ads Manager, the legal entity that advertises and is billed must be based in a country marked as available. Vietnam is on that list, and so are most home markets of companies entering Vietnam: the United States, the United Kingdom, every EU member state, Japan, Korea, Singapore and Australia. Mainland China and Hong Kong are not, which matters for the many Chinese brands entering Vietnam: their self-serve route runs through an entity based elsewhere.

The second is the home-country rule. Some new self-serve accounts can at first advertise only in the country associated with the account, and selecting other countries does not override it. The account becomes eligible for other supported countries once identity verification is approved and it has reached a required level of spend on campaigns in its home country. OpenAI does not publish that level.

Put together, a brand entering Vietnam has four routes, each with a different owner of the account and the data:

The agency partners OpenAI names are dentsu, Havas Media, Omnicom Media, Publicis Groupe and WPP, alongside technology partners.

Vietnamese law adds a question of its own. Article 39 of the Advertising Law requires a foreign company that does not operate in Vietnam to advertise there through a Vietnamese advertising service provider. Whether buying through a global platform’s self-serve account satisfies that rule is unsettled, as set out in Vietnam’s advertising law in 2026. It is a question for counsel before the first spend, and it applies to ChatGPT exactly as it applies to every other platform.

What it costs: the pricing model, and the prices nobody publishes

ChatGPT ads are sold at auction, with no rate card. Each campaign takes one objective, and the objective sets how you pay:

• Views: billed per 1,000 impressions.
• Clicks: billed per valid click.
• Conversions: delivery optimises towards a chosen conversion event, but billing stays on clicks or impressions. The help page is explicit that you do not pay per conversion, and the bid cap in these campaigns is a bid, not a guaranteed cost per acquisition.

There are no keywords. Each ad group carries context hints describing what is offered, to whom and when it helps. OpenAI states that they are not exact-match keywords and do not guarantee delivery in any particular conversation.

A daily budget is an average over seven days. A single day can spend up to twice the amount, a Sunday-to-Saturday week no more than seven times it, both in the account’s time zone. A campaign that spends its weekly allowance early can stop delivering until the next week while still shown as active. A campaign-total budget is the stricter alternative.

The minimum daily budget depends on the account’s billing currency:

At roughly VND 26,000 to the dollar, the dong minimum is under USD 1 a day, against USD 25 for an account billed in dollars. Billing currency, country and time zone are fixed when the account is created. Either way, the minimum is not the barrier. The barriers are category policy and measurement.

OpenAI publishes no prices and says, in its own FAQ, that ChatGPT ads do not yet have performance benchmarks across advertisers, industries or campaign types. The figures that circulate come from the US pilot. Adweek reported in January 2026 that OpenAI was asking select advertisers for a minimum commitment of USD 200,000 at a USD 60 CPM; Digiday reported in April 2026 that CPMs had fallen to as low as USD 25. Those describe a different market, an earlier stage and a managed pilot rather than a self-serve auction. They tell you nothing about prices in Vietnam, where the auction is a few weeks old.

Which categories are barred, and what Vietnamese law adds

OpenAI’s advertising policy (version 1.6, September 2026) limits the early phase to a set of consumer categories. Several categories that foreign companies bring to Vietnam fall outside it:

The policy covers the landing page as well as the ad. OpenAI’s own example is a food delivery ad that links to alcohol delivery.

OpenAI’s review sits on top of Vietnamese law rather than replacing it. Two rules from that law matter most here. Ads shown in Vietnam must carry their content in Vietnamese, and OpenAI notes that an ad’s language can differ from the language of the conversation, so a campaign targeting Vietnam needs Vietnamese creative and a Vietnamese landing page. And categories that need content approval in Vietnam still need it before the campaign runs, whatever OpenAI’s review decides.

Does paying for ads get a brand into ChatGPT’s answers?

No, and OpenAI is unusually direct about it: ads do not influence the answers, they run on separate systems from the chat model, and advertisers have no ability to shape, rank or alter ChatGPT’s responses. Product feeds uploaded for ads stay in ads; during the beta, those products do not appear in ordinary conversations.

So there are two separate jobs, bought with two different things:

• Being named in the answer comes from content: pages that answer the questions buyers actually ask, with sources, in a form machines can read. ChatGPT uses OAI-SearchBot to surface websites in its search features, and sites that block it are not shown in search answers.
• Appearing below the answer comes from money, through the auction.

The two share one technical condition. OpenAI’s help pages require landing pages not to block OAI-AdsBot, which checks ad destinations, or OAI-SearchBot, and the policy says ads or landing pages its systems cannot review are not eligible to run. On a global website, bot protection may be configured at head office, far from the team running Vietnam. Check that the Vietnamese pages admit both crawlers before the first campaign, not after the first rejection.

Where ChatGPT fits in an entry plan

OpenAI’s own examples of what people bring to ChatGPT are planning a trip, choosing software for a business and furnishing a home. These are considered purchases, where the buyer describes a problem in full sentences before choosing. That is where the channel has a plausible job: software, education, travel, durable household goods. For impulse purchases sold mainly through marketplaces, there is no reason for it to come early.

Even in the right category, it is rarely the first channel. A test needs three things already in place: a Vietnamese landing page, a measurement setup that records the source of each lead or order, and another channel whose cost per customer is known, to compare against. The order of channels for an entry, and why it runs that way, is covered in which digital channels matter in Vietnam.

There is one case for moving it earlier. If ChatGPT’s answers in your category already name competitors, an ad is the only way to appear at that moment until your own content earns a mention.

A worked example: eight weeks beside Google Search

The example is illustrative and every figure is invented.

A Singapore company selling point-of-sale software to small restaurants has set up a Vietnamese subsidiary. The subsidiary opens a self-serve account billed in dong; figures are shown in US dollars for readability. Before spending anything, the company writes down three things:

• The ceiling. From its own figures, a paying customer is worth at most USD 400 in advertising cost. Demo requests in other markets convert to paying customers at about 25%, so the ceiling per demo is USD 100.
• The budget. An average of USD 60 a day on each channel for eight weeks, so USD 3,360 each.
• The stopping rule, on cost per paying customer from the CRM: up to USD 400, continue; over USD 600, stop; in between, extend four weeks and change the ad groups.

After eight weeks:

Read from Ads Manager, ChatGPT costs almost the same per demo as Google, USD 86 against USD 80. Read from the CRM, it costs about 60% more. The gap comes from the 11 conversions credited because someone had seen an ad within the previous day, and from last-touch credit for people who also arrived through other channels.

The decision, though, sits in the last row. ChatGPT’s demos converted at about 35%, against about 24% for Google, so a paying customer cost USD 373: 11% more than Google and inside the USD 400 ceiling. Under the rule written in advance, the test continues. It continues at the same budget, because nine customers are too few to trust a conversion rate, and the next eight weeks are there to add customers rather than to scale. One more check belongs in that period: whether Google’s branded searches fell while ChatGPT ran, because a channel that takes customers from another is not adding any.

Measuring it from head office

Ads Manager reports impressions, clicks, spend, average CPC and CPM, and conversions once the JavaScript pixel or the Conversions API is in place. Four details decide how to read the numbers:

• Attribution windows. Click-through windows of 7, 14 or 30 days, and a view-through window of 0 or 1 day. When comparing with other channels, set the view-through window to 0 so that every channel counts the same way.
• Last-touch credit. OpenAI states that this is not multi-touch attribution. Someone who saw a Facebook ad, searched on Google and then clicked a ChatGPT ad is credited in full to ChatGPT.
• Latency. Impressions and clicks refresh about every 15 minutes, spend arrives 7 to 8 hours later, attributed conversions 24 to 48 hours later. A head office reading yesterday’s figures from another time zone will see a partial day.
• Advanced matching. The pixel hashes customer details typed into forms and sends them with conversion events. In Vietnam that is processing of personal data, and it belongs in the notice and consent required by the Personal Data Protection Law in force since 1 January 2026.

Outside the platform, three habits keep the comparison honest: UTM parameters on every ad URL (Ads Manager can fill campaign, ad group and ad IDs automatically), a source field filled in when each lead enters the CRM, and the question “how did you hear about us” at intake. How to build one measurement setup across all channels from abroad is covered under marketing measurement.

Where the facts in this article come from

• OpenAI: “ChatGPT Ads expands to Southeast Asia and Taiwan” (23 September 2026), “Expanding access to AI with ChatGPT Ads” (late August 2026), “Ad policies” version 1.6 (September 2026), and the overview of OpenAI crawlers (OAI-SearchBot, OAI-AdsBot).
• OpenAI help pages, read on 11 October 2026: Ads in ChatGPT; Ads Manager Availability; Create Campaigns for ChatGPT Ads (objectives, budgets, minimums by currency, the home-country rule); Conversion-optimized Campaigns; Create ad groups; Best practices for creating ads; Measure results; Frequently Asked Questions; Create Campaigns from Product Feeds; Ads Manager Beta Account Setup.
• Statcounter Global Stats, AI Chatbot Market Share Viet Nam, September 2025 to September 2026.
• Trade press on US pilot pricing: Adweek (January 2026) and Digiday (April 2026), as reported, not confirmed by OpenAI for Vietnam.

Platform rules change month by month during the beta; the figures here are correct at the date of publication. All figures in the point-of-sale example are illustrative.

Where this work stops

MWY does not run ChatGPT campaigns, write ad copy, or take commission from OpenAI, its agency partners or any platform.

Deciding where ChatGPT belongs in the order of channels for an entry, which entity owns the account, and what a first test has to prove before it earns more budget is part of Go-to-Market Strategy. For a brand already selling in Vietnam, reading each channel’s cost per customer from the CRM every month is part of Vietnam Marketing Advisory & Oversight.