Google AI Mode vs Gemini: What's the Difference

Google AI Mode is an AI-powered mode of Google Search that answers complex questions with links to supporting websites. Gemini is Google's standalone AI assistant. Both run on Gemini models, but AI Mode is grounded in Google Search and governed by Search's rules, while the Gemini app is a general-purpose assistant. For marketers, the practical difference is which controls apply, how often links appear, and where you measure traffic.

Key takeaways

• AI Mode lives inside Google Search; eligibility for Search is the gate.
• Googlebot rules control AI Mode crawling; Google-Extended does not.
• AI Mode traffic is counted inside Search Console's Web performance data.

What is Google AI Mode?

Google introduced AI Mode on 5 March 2025 as an early experiment in Search Labs, describing it as a mode that "expands what AI Overviews can do with more advanced reasoning, thinking and multimodal capabilities" (Google blog). It handles follow-up questions in a conversation and returns a long answer with links.

Google's documentation for site owners says AI Mode and AI Overviews may use "query fan-out", issuing multiple related searches across subtopics to build a response, and that they "may use different models and techniques, so the set of responses and links they show will vary" (Google Search Central).

What is Gemini?

Gemini is both the name of Google's model family and of its consumer assistant app (gemini.google.com and mobile apps). The app writes, summarises, plans, codes and answers questions. For some requests it uses Google Search to ground its answer; for others it responds from the model. It is not a Search results page, so Search features such as ranking reports don't apply directly.

How do AI Mode and Gemini compare?

Sources for the controls and measurement rows: Google Search Central, AI features and Google's common crawlers.

What does Google-Extended control, exactly?

This trips up a lot of teams. Google states that robots.txt directives for Googlebot are the control for how sites are crawled for Search, AI features included. To limit what is shown from your pages in Search, you use nosnippet, data-nosnippet, max-snippet or noindex. Google-Extended is a separate token for limiting AI training and grounding in some of Google's other systems (Google Search Central; crawler list).

So:

• Blocking Google-Extended does not remove you from AI Mode or AI Overviews.
• Blocking Googlebot removes you from Search, including AI Mode. Almost never what you want.
• Using nosnippet limits what can be quoted, which also limits your chances of being cited.

# Opt out of Gemini training/grounding in other Google systems,
# while staying fully in Google Search (including AI Mode)
User-agent: Google-Extended
Disallow: /

Decide this deliberately. Opting out of Google-Extended may reduce how your content is used in Gemini app answers.

How do you test your brand in both?

1. Pick 15-20 prompts that match real buyer questions.
2. In Google, open AI Mode and run each prompt in a fresh session. Record brands named, links shown and their domains.
3. In the Gemini app, run the same prompts. Note whether it shows sources and which ones.
4. Repeat each prompt at least twice; both surfaces can vary.
5. Compare: are the cited domains the same? Where you appear in one but not the other, look at what the cited pages have in common.

Typical findings to look for, rather than assume:

• AI Mode answers that cite more pages than a classic results page, because of fan-out.
• Gemini app answers that lean on general knowledge for broad questions, and on Search for specific or current ones.

Which one should you optimise for first?

For most brands, AI Mode, because:

• It sits inside Google Search, where your buyers already are.
• The levers are known: indexing, snippet eligibility, helpful content (Google).
• You can measure it in Search Console alongside organic traffic.

Gemini app visibility follows from broad, consistent coverage of your brand across the web and good standing in Search. There's no separate submission process.

What should you put in your reporting?

• Search Console: AI Mode is included in the Web search type; you won't get a separate AI Mode line, so watch query and page trends (Google).
• GA4: track referrals from gemini.google.com as part of your AI channel (tutorial).
• Prompt scans: report AI Mode and Gemini as separate engines in your monthly visibility report.

Common mistakes

• Blocking Google-Extended and assuming you've left AI Mode (you haven't).
• Adding nosnippet sitewide to "protect content", then losing citations everywhere in Search.
• Treating one AI Mode answer as representative. Run the prompt several times.
• Reporting Gemini and AI Mode as one number. They behave differently.

Sources

• Google, Expanding AI Overviews and introducing AI Mode (5 March 2025)
• Google Search Central, AI features and your website
• Google Search Central, Google's common crawlers
• Google Search Central, Creating helpful, reliable, people-first content