OpenAI published an engineering post explaining the technical stack behind ads shown in ChatGPT. According to the company, the system uses a large language model (LLM) to interpret the context of a conversation and the user's intent, then matches ads accordingly.
Keeping ads apart from answers
The central point is that ads are kept separate from the model's generated answers. OpenAI frames this separation as a core principle for user trust: ad content does not blend into the assistant's response.
Scale and relevance
The company says the infrastructure is built to deliver "relevant ads at scale." Understanding conversational intent is presented as the way to pick the right ad in multi-turn, context-heavy chats, which differ from a single search query.
The disclosure comes as ChatGPT ads expand across a wide set of markets. It offers a look at how OpenAI plans to grow its ad business while claiming to protect user trust.
