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openai_blog · Oct 21, 2026 · news

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How we built ChatGPT’s novel ad stack for user trust and relevance

the OpenAI blogOct 21, 2026
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In brief

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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How we built ChatGPT’s novel ad stack for user trust and relevance

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