TLDR
Amazon Ads launched a US-only pilot on 10 September 2026 letting buyers purchase ChatGPT inventory through its demand-side platform on CPM or CPC terms, with Delta Vacations among the first brands. The same week, OpenAI's August advertising terms took effect barring rival AI tools from advertising inside ChatGPT.
KEY TAKEAWAYS
Two moves, one week
Our 8 September piece covered ChatGPT's self-service ad offering. Two things have changed since then, and they change the shape of the market rather than just its size. On 10 September 2026, Amazon Ads launched a US-only pilot letting advertisers purchase ChatGPT inventory through Amazon DSP, the first time a third-party programmatic platform has been able to sell that supply.[1] The same week, OpenAI's Advertising Terms from 25 August took effect, authorising the company to bar entire categories of advertisers from the platform.[2]
Both moves landed in the same seven-day window: the first programmatic plumbing for ChatGPT's ad market, and the first walled garden rules to govern it.
What Amazon DSP adds to the picture
A demand-side platform automates and centralises media buying from multiple supply sources.[3] Amazon DSP already aggregates inventory across Prime Video, Fire TV and a wide pool of premium publisher exchanges, letting buyers use Amazon's first-party shopping data to target audiences across all of it. Adding ChatGPT to that mix means an agency can include conversational AI placements in a media plan without going directly to OpenAI.
Chris Conetta, Director of Omnichannel Supply at Amazon DSP, said conversational ads represent the fastest growing engagement opportunity for brands to reach new and existing audiences.[1] The pilot supports both CPM and CPC buying, matching the two models OpenAI introduced directly: CPM at the February 2026 launch, then CPC on 5 May 2026.[4]
Delta Vacations is among the first confirmed brands in the pilot. Katrin Koenig, President of Delta Vacations, said the partnership allows the brand to leverage deep consumer insights to inform how and when Delta Vacations appear within ChatGPT Ads experiences to create new opportunities for travelers to engage and discover vacation possibilities.[5] A travel brand sitting among the first buyers fits with ChatGPT's growing use for trip research and itinerary planning.
Excited to see Amazon DSP extend programmatic buying into ChatGPT ads, marking a new era for conversational ad supply.
2026-09-10 · View on XThe walled garden clause nobody announced loudly
While the Amazon pilot drew most of the attention, the more structurally significant development arrived a fortnight earlier with far less fanfare. OpenAI's Advertising Terms, effective 25 August 2026, explicitly authorise the company to block any advertiser or category of advertisers, a clause that now bars rival AI image and audio tools, Adobe among them, from buying space inside ChatGPT.[2]
The clause gives OpenAI the same supply-side lever that Meta and Google have exercised for years: the ability to decide whose money it accepts. Barring Adobe and similar tools keeps direct competitive messaging from appearing immediately below a ChatGPT response. OpenAI has not said whether the exclusion list will grow. Analyst Nate Elliott said on the day of the Amazon announcement that OpenAI tightening the walled garden by blocking competitor AI tool ads may spur antitrust scrutiny.[6]
OpenAI tightening the walled garden by blocking competitor AI tool ads may spur antitrust scrutiny. Food for thought.
2026-09-11 · View on XThe ChatGPT ad timeline, condensed
| Date | Development | Buying options |
|---|---|---|
| 9 Feb 2026 | Ads launch in ChatGPT for Free and Go users | CPM |
| 5 May 2026 | CPC bidding added | CPM and CPC |
| 25 Aug 2026 | Advertising Terms take effect, including competitor exclusion clause | CPM and CPC |
| 10 Sep 2026 | Amazon DSP pilot launches; Delta Vacations confirmed as early buyer | CPM and CPC via DSP |
What Australian buyers can do right now
The Amazon DSP pilot is US-only, and ChatGPT ads remain unavailable in Australia.[1] Local buyers cannot yet act on any of this directly. The two things worth tracking are when Amazon DSP extends ChatGPT supply to non-US markets, and whether OpenAI's category exclusion list grows beyond AI image and audio tools.
When OpenAI began serving ads on 9 February 2026, sponsored units appeared below responses for Free and Go tier users without affecting the answers themselves.[7] That separation between ad placement and answer content remains the said policy. Australian agencies now have two concrete benchmarks to watch: DSP access and exclusion policy, in that order, before any local rollout date is confirmed.
SOURCES & CITATIONS
FREQUENTLY ASKED QUESTIONS
What is Amazon DSP and why does it matter for ChatGPT advertising?
Which advertisers does OpenAI's competitor ban cover?
When will ChatGPT ads be available in Australia?
What buying models does the Amazon DSP pilot support?
Xaviery Malinao writes for Prompt the Market on how brands and agencies are adapting to answer engines, drawing on Bushnote's work with clients across search, AI search and content.
