Google AI Mode runs on Gemini 3.7 Flash — and clarifies impressions
In August 2026, Google communicated several changes around AI search at once. From August 14, AI Mode answers a share of queries with Gemini 3.7 Flash — confirmed by the VP of Search. Arguably more important for practitioners is a measurement clarification: in AI Overviews and AI Mode, only visible links count as impressions — plain brand mentions without a link do not. Both were documented via industry recaps and Google statements.
What Google clarified in August 2026
- From August 14: AI Mode serves answers for a share of queries with Gemini 3.7 Flash (confirmed by the VP of Search).
- Impressions rule: in AI Overviews and AI Mode, only visible links count as an impression in Search Console.
- Plain brand mentions without a linked click path do not count as an impression.
- Google says it shows more links in AI Mode and AI Overviews — aiming to surface more relevant websites, original content, and trustworthy sources.
Where things stood
For many site owners it was unclear what visibility in AI search actually means in measurable terms. Reporting often treated any mention of a brand in an AI answer as “visibility” — regardless of whether it produced a linked click path to the site. For GEO monitoring, that meant metrics from various tools and from Search Console were hard to reconcile.
On the model side, it was open which Gemini model actually powers AI Mode. Google communicated AI Mode as a feature, not a specific model version — and swapped underlying models without a fixed public mapping.
What now applies
1. AI Mode runs (partly) on Gemini 3.7 Flash. The VP of Search confirmed that from August 14 a share of AI Mode queries is answered with Gemini 3.7 Flash. Flash is the fast, throughput-optimized Gemini line — the choice suggests Google designs AI Mode for speed and volume rather than maximum reasoning depth per query.
2. Only visible links count as impressions. This is the most practically relevant clarification. In AI Overviews and AI Mode, Search Console registers an impression only when a visible link to the page is served. If a brand is only mentioned in text without being linked, it does not appear as an impression. So anyone measuring AI visibility via GSC impressions measures linked mentions exclusively.
3. Google shows more links in AI answers. Google says it is increasing the number of links surfaced in AI Mode and AI Overviews to expose more relevant websites, original content, and trustworthy sources. For publishers, that potentially means more linked mentions — and therefore more data points that reach GSC at all.
Reading
The model news and the impressions rule belong together, even though they were communicated separately. That AI Mode runs on Flash says something about Google’s priorities: fast, low-cost answers at high volume rather than expensive reasoning runs per query. For a website’s visibility that is indirectly relevant — a faster, more broadly rolled-out AI feature reaches more searches.
The impressions clarification is where GEO reporting has to get honest. If only visible links count, the GSC impression is a narrower metric than what many GEO tools report as “visibility” or “share of voice”. The two do not measure the same thing: a tool can count a brand mention in an AI answer that never appears as an impression in GSC. Putting both numbers side by side without naming the difference produces reports that do not add up internally.
For agency clients that means, concretely: GEO visibility cannot be captured with a single number. Linked impressions (GSC) and brand mentions (GEO tools) are two separate layers — both legitimate, but not interchangeable.
What you can do now
If you set up GEO monitoring: cleanly separate linked impressions from Search Console and brand mentions from GEO tools in your reporting. Label both metrics explicitly so no one reads them as the same figure.
If you analyze GSC data: expect AI impressions to reflect linked mentions only. A low value does not necessarily mean low AI visibility — it can mean your brand is mentioned but not linked. Check that against mention tracking.
If you target more AI links: work on citable, standalone content (clear answer sentences, sourced facts, original data). Google states it links more relevant and trustworthy sources — that is exactly where content work applies.