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  "url": "https://appliedfrontier.nl/en/research/signal-ea92da5c121ecb45/",
  "title": "How we built ChatGPT’s novel ad stack for user trust and relevance",
  "published": "2026-10-21",
  "excerpt": "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.",
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