{"type":"post","id":"how-we-built-chatgpt-s-novel-ad-stack-aac391","slug":"how-we-built-chatgpt-s-novel-ad-stack-aac391","title":"How we built ChatGPT’s novel ad stack for user trust and relevance","description":"OpenAI has published an account of the advertising stack it says it built for ChatGPT.","retrieval_nugget":"OpenAI has published an account of the advertising stack it says it built for ChatGPT.","published_at":"2026-10-21","updated_at":"2026-10-21","record_date":"2026-10-21","date_kind":"published_at","topics":["ai-business-models","personalization"],"entities":["OpenAI","ChatGPT"],"related_patterns":[],"novelty_label":"new_fact","what_changed":"Adds a technical account of OpenAI’s LLM-powered ad stack, including conversational-intent targeting, separation of ads from answers, and relevance at scale, beyond the earlier format and measurement announcement.","prior_refs":["memory:faf54800-3f1a-8819-ac35-16ad7ba3342c","memory:adc73c00-7f24-8235-a255-cef302422446"],"source_url":"https://openai.com/index/building-chatgpt-ad-stack","source_urls":["https://openai.com/index/building-chatgpt-ad-stack"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:how-we-built-chatgpt-s-novel-ad-stack-aac391","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/how-we-built-chatgpt-s-novel-ad-stack-aac391/","markdown":"https://newruntime.com/posts/how-we-built-chatgpt-s-novel-ad-stack-aac391.md","json":"https://newruntime.com/posts/how-we-built-chatgpt-s-novel-ad-stack-aac391.json"},"next_reads":[{"type":"topic","path":"/topics/ai-business-models/","url":"https://newruntime.com/topics/ai-business-models/","title":"Ai Business Models","reason":"Explore the ai-business-models topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/ai-business-models.md","json_url":"https://newruntime.com/topics/ai-business-models.json"},{"type":"topic","path":"/topics/personalization/","url":"https://newruntime.com/topics/personalization/","title":"Personalization","reason":"Explore the personalization topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/personalization.md","json_url":"https://newruntime.com/topics/personalization.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}