---
title: How we built ChatGPT’s novel ad stack for user trust and relevance
link: https://openai.com/index/building-chatgpt-ad-stack
source: openai-com
published: 2026-10-21T07:00:00Z
updated: 2026-10-21T07:00:00Z
first_seen: 2026-10-21T14:37:58.044590695Z
labels:
- engineering
summary: Learn how OpenAI built ChatGPT’s LLM-powered ad stack to understand conversational intent, keep ads separate from answers, and deliver relevant ads at scale.
content: feed
html: 2026-10-21-how-we-built-chatgpt-s-novel-ad-stack-for-user-trust-and.html
---

Learn how OpenAI built ChatGPT’s LLM-powered ad stack to understand conversational intent, keep ads separate from answers, and deliver relevant ads at scale.