ChatGPT vs Google AI Overviews: which to optimise for

The question comes up in almost every conversation: should we focus on ChatGPT or on Google's AI Overviews? It sounds like a fork in the road. It mostly is not, because the work that wins one wins the other.

You do not choose between ChatGPT and Google AI Overviews. You sequence them, based on where your buyers actually are.

Google AI Overviews sit inside the search your buyers already run. ChatGPT reaches people who have moved their research into an assistant. This is how they differ, which to prioritise, and why the underlying work is largely shared.

Where each one reaches your buyer

Start with the difference that actually matters for prioritisation: audience and moment.

Google AI Overviews appear at the top of ordinary Google results. That means they reach the widest possible audience, anyone still starting at a search box, and they are tied to live search, so they reflect what your pages look like right now. This is the surface with the most reach.

ChatGPT reaches a different person: someone who has chosen an assistant over a search engine, often for a longer, more conversational piece of research, and frequently deeper into a decision. Smaller audience, but often higher intent and further down the funnel.

How the two surfaces work differently

The mechanics differ enough to be worth understanding, even though they do not change the core work.

AI Overviews are retrieval-based. Google searches the live web, reads what it finds, and composes the Overview from those sources, so improvements to your site can show up within weeks. The route to being cited is covered in how to rank in Google AI Overviews.

ChatGPT answers from a mix of what it learned in training and, when browsing is enabled, live retrieval. That makes part of its behaviour slower to influence and part of it similar to an Overview. The practical route to visibility there is in how to show up in ChatGPT search.

Why the underlying work is mostly the same

Here is the point that dissolves the either-or. The levers that get you cited are shared across both.

Being technically accessible, answering questions in clean self-contained passages, keeping a consistent entity, earning third-party corroboration, and publishing something original are what put you in the answer, whichever surface is answering. A page built that way is a candidate for both an Overview and a ChatGPT response at once.

So the real work is not two projects. It is one strong, citable source, built once and measured in both places. Optimising a page for one surface at the expense of the other is rarely a real trade-off.

How to decide where to start

Given a shared foundation, prioritisation is about sequencing, and the deciding factor is your buyers.

If your category is high-volume and research-led, and your buyers still start at Google, weight early effort toward AI Overviews for reach. If your buyers are B2B, comparison-heavy, or already living in assistants, ChatGPT visibility may matter more for the decisions that count.

You do not have to guess. Run your buyers' real questions across both surfaces, record where you are named or cited and where a competitor is instead, and let that evidence set the weighting. The comparison logic for two assistants is the same as in ChatGPT vs Perplexity: measure your own presence rather than argue in the abstract.

The takeaway

ChatGPT and Google AI Overviews are not a choice between two strategies. AI Overviews reach the widest audience inside ordinary search; ChatGPT reaches people who have moved into an assistant, often later in a decision. The work that wins both is largely the same.

Build one accessible, extractable, trustworthy, original source, then measure where you are named for your own buyer questions and weight effort toward where those buyers are.

If you want a measured read of how you currently appear across ChatGPT, Google AI Overviews, and the other assistants your buyers use, that is what an AI visibility audit provides.

This article is part of the SEO in the AI Era: The Complete Guide guide.