AI Mode model choices complicate citation comparisons

A screenshot of an AI Mode answer records one result from one account. When a subscriber can choose the model, that choice belongs in the record too. The arrival of Gemini 3.7 Flash in August 2026 makes this particularly relevant to citation comparisons.

What the model choice changes

An AI model is the engine that writes the answer. Google has a family of them, all called Gemini, with different capabilities and release schedules.

AI Mode is where that engine sits inside Google Search. You type a question, you get a paragraph or two of prose, and a small number of links to the pages the answer drew on. Those links are called citations, and winning them is what people mean by AEO or GEO — optimising so an answer engine names your site as a source, rather than optimising for position three in a list of blue links.

Until now, most people using AI Mode got whatever engine Google had set as standard, or an “Auto” setting that picks one for you based on how hard your question looks. What changed on 14 August is that a paying subscriber can override both and choose from a list.

Two engines reading the same web pages do not necessarily pull out the same sentences or credit the same sites. Google publishes no mapping of which engine cites what.

What actually happened

Gemini 3.7 Flash shipped on 13 August, about three weeks after the model it replaces, according to 9to5Google, at roughly half the launch price of that predecessor. Google’s own model card is modest about it, describing the model as based on its predecessor with “algorithmic improvements to its core reasoning foundation” rather than a rebuild from scratch.

The Search part came the next day. Robby Stein, a VP of product at Google, posted that it was rolling out “today globally in AI Mode for Google AI Pro & Ultra subs in English”. That was picked up by Search Engine Land and, separately, by Search Engine Journal. You reach it by clicking the “+” icon in the ask-anything bar and choosing from the model list.

Search Engine Journal flags two things Google has not said: whether 3.7 Flash becomes the default for everybody, and whether the Auto router can now send your question to it without telling you. Google’s support pages hadn’t been updated to mention the option at all.

Comparing results across accounts

When you check an AI Mode answer, note the visible model selection as well as the query, account conditions and date.

Treat AI Mode as a distribution rather than a fact. Ask the same question repeatedly and look at how often your client shows up, not whether they showed up that once. That was already the right way to track AI Overviews and AI Mode, which vary between users anyway. A visible model picker makes the variance impossible to ignore.

Keep changed facts available on the site

Buried in the model card is a number that matters more than the benchmarks. The knowledge cutoff — the stated limit of its training knowledge — is March 2026, and the card warns that for some subjects its knowledge stops as far back as January 2025.

So take anything about your client that changed after March 2026. A price. A new branch. A product they stopped selling. Do not assume the model has reliable training knowledge of those changes. Make the current information available to retrieval and verify the answer it gives.

That puts the weight back on the page. The fact has to be there as text, not baked into an image or a PDF. The page has to be reachable by the crawler, the automated reader that fetches pages on the engine’s behalf: no stray noindex tag telling engines to skip it, no blocking rule in robots.txt, the small file at the root of a site that tells automated readers where they may go. And it has to render without waiting for JavaScript, because most of these fetchers don’t wait.

What to check

• Run your standard client queries in AI Mode more than once, on different days, and record whether the client appeared rather than what the paragraph said.
• If you have a Pro or Ultra account, run the same query on 3.7 Flash and on Auto, and note where the cited sources differ. That’s free evidence about how much model choice moves your results.
• For every fact that changed since March 2026, confirm it exists as plain text on a crawlable page. Prices in images are the usual offender.
• Stop treating a single flattering AI answer as a deliverable. Repeat the check before treating it as a stable result.

For a repeatable reporting method, see measuring AI citations.