Short answer
LLM ads are paid placements shown inside or next to answers generated by large language model (LLM) assistants, such as ChatGPT, Microsoft Copilot and Google's AI Overviews and AI Mode. They are matched to the conversation rather than to a single keyword, labelled as sponsored and kept separate from the answer. In October 2026 the main self-serve option is ChatGPT ads, bought in OpenAI's Ads Manager.
Where LLM ads appear in 2026
LLM ads, also called AI ads or conversational ads, now run on a handful of platforms. They are bought in different ways and have different rules, so it helps to see them side by side.
| Platform | How you buy it | Status in October 2026 |
|---|---|---|
| ChatGPT | OpenAI Ads Manager, self-serve | Live in 63 countries; shown to logged-in adults on the Free and Go plans |
| Google AI Overviews | Existing Search, Shopping and Performance Max campaigns | US since October 2024, 11 more English-language markets since December 2025 |
| Google AI Mode | Existing Google Ads campaigns | Testing in the US |
| Microsoft Copilot | Microsoft Advertising | Live, including Showroom ads |
| Perplexity | No longer recommended | Winding ads down by the end of 2026 |
| AI chat app networks, such as Thrad | Network or managed service | Inventory varies; check it before buying |
How an LLM ad is chosen
In ChatGPT, OpenAI picks eligible ads using the conversation context, the ad itself, its landing page and the context hints the advertiser wrote. It then runs a relevance-weighted second-price auction, so a more relevant ad can win at a lower bid. The winning ad appears below the response, labelled as sponsored. The answer itself is not changed by the ad.
Google works differently: ads in AI Overviews come from your existing campaigns, using broad match or keywordless targeting, and you can't target or report AI Overview placements separately.
What makes LLM ads different
- Matched to a conversation, not a keyword list
- Buyers arrive mid-research, often with a specific need such as pricing or an integration
- No job-title or firmographic targeting: you target the topic, then identify the company after the click
- Strict placement rules: no ads next to health, politics and other sensitive topics, in Temporary Chats or for users under 18
What B2B teams should do first
- List 10–20 questions your buyers actually ask AI assistants
- Group them by topic: category, comparison, pricing, integration and problem
- Build one ad group per topic, with its own context hints and a matching landing page
- Identify the companies behind the visits and send ideal-fit ones to sales
- Judge results on named companies and pipeline, not clicks alone
Questions
Are LLM ads the same as AI ads?
Mostly. "AI ads" is the broader term and can include AI-made creative. "LLM ads" means ads placed inside or beside the answers of large language model assistants.
Do LLM ads change what the AI says?
No. In ChatGPT, ads are labelled as sponsored and kept separate from the answer, and the organic answer is not influenced by advertisers.
How much do LLM ads cost?
For ChatGPT, agencies report about $3–5 per click. The minimum budget in the US is $25 a day per campaign.
Facts checked against the sources below on 13 October 2026. Platforms change quickly: if something here no longer matches what you see, tell us and we will update it.
Sources
- OpenAI Help Center: Ads in ChatGPT, the basics
- OpenAI Help Center: Ads in ChatGPT
- OpenAI Help Center: Ads Manager availability
- PPC Land: Google expands AI Overview ads to 11 countries (December 2025)
- Search Engine Land: Microsoft Copilot adds Showroom ads
- B&T: Perplexity cans advertising (2026)
- Index Lab: What ChatGPT ads really cost in 2026
