Foreword — Why the May 5 Launch Changes the Market

On February 9, 2026, OpenAI ran ads inside ChatGPT for the first time. The bar to participate was a $200,000 minimum spend and a hand-picked list of pilot brands. For most Shopify operators, the product didn’t exist yet.

On May 5, 2026, the bar disappeared. OpenAI opened the self-serve Ads Manager to all U.S. advertisers, removed the minimum spend, shipped a JavaScript Pixel and a Conversions API, and announced new technology partners — Adobe, Pacvue, Kargo, StackAdapt — for plumbing the buy.

That date is the inflection point this encyclopedia is built around. Before May 5, ChatGPT Ads was a vendor demo. After May 5, it was a buyable performance channel for any operator with $1 to spend and 30 minutes to install a pixel.

The chapters that follow document, with as little editorialising as possible, what OpenAI itself publishes about the product. The user-facing experience (where ads appear, who sees them, the privacy model). The measurement stack (the pixel, the Conversions API, the event taxonomy). And the Advertiser API (how to create campaigns, ad groups, ads, files, and pull insights programmatically).

Read this end-to-end if you want the whole map. Use it as a reference if you’re already shipping. Either way, the goal is the same: take a Shopify brand from “I’ve heard of ChatGPT Ads” to “I can ship a campaign tomorrow morning, measure it, and explain the numbers.”

The companion document is Chapter 25 of the CRS Encyclopedia, which sits inside the broader operating system for getting AI-recommended in the first place. ChatGPT Ads runs on top of CRS — the higher your contextual fit, the lower your effective CPC. This encyclopedia covers the ads. The CRS Encyclopedia covers the foundation that makes the ads cheaper.

— Paidaisearch, 2026-05-06