How to Use Google AI Mode: Agents, Personal Intelligence, and Deep Search

Google AI Mode crossed one billion monthly users in May 2026, and the I/O announcements moved it from a chat-style search experiment into a system that monitors topics for you while you sleep. This guide shows you how to use Google AI Mode for everyday research, how to set up the new background information agents, and how to connect Gmail and Photos for personalized answers without paying for a subscription. If you have only used the AI Overviews that appear above blue links, what you are about to set up is a different product.

Deep Search remains restricted to Google AI Pro and Ultra subscribers in the US in English, so a few sections below apply only if you pay. The rest is free in nearly 200 countries.

What Google AI Mode Actually Is Now

AI Mode is the dedicated tab inside Google Search that runs full Gemini reasoning against live web retrieval, rather than the short summary blurb that appears above standard results. According to Google's I/O 2026 announcement, the product has surpassed one billion monthly users and queries have more than doubled every quarter since launch. The same post confirms that Gemini 3.5 Flash is now the default model powering AI Mode for every user globally.

The practical implication is speed. Flash variants of Gemini are tuned for low-latency multi-step reasoning, which matters because AI Mode rarely answers from a single source. Google's developer documentation describes the underlying technique as a "query fan-out," issuing multiple related searches across subtopics and data sources simultaneously to develop a single response. You ask one question. Google runs dozens.

The new front door is a redesigned search box that Google calls the biggest upgrade to the Search box in over 25 years, accepting text, images, files, videos, and Chrome tabs as inputs. Drag a PDF in. Paste a screenshot. Hand it three open tabs and ask which laptop to buy.

Google AI Mode vs AI Overviews Difference, in One Paragraph

The Google AI Mode vs AI Overviews difference is structural, not cosmetic. AI Overviews are a short generated paragraph stapled to the top of a standard results page, designed to summarize. AI Mode is a separate conversational surface where the model can run hundreds of sub-queries, follow up across turns, accept multimodal inputs, and trigger features like Deep Search and information agents. Google's developer docs note that the two surfaces may use different models and techniques, so the citations they show will not match for the same question.

One side-effect worth knowing before you trust either: a March 2026 SE Ranking study covered by Search Engine Land analyzed 1.3 million AI Mode citations and found Google-owned properties account for roughly 20% of cited sources, with 59% of Google citations pointing back into traditional Google search results. AI Mode tends to keep you inside Google's surfaces even when it appears to cite the open web.

Turning AI Mode On and Asking Your First Real Question

On desktop, open google.com and select the AI Mode tab next to the standard category tabs. On mobile, open the Google app and tap the AI Mode entry below the search bar. There is no opt-in for the core experience anymore in the US, and Google says Personal Intelligence in AI Mode is now expanding to nearly 200 countries and territories across 98 languages with no subscription required, a figure independently corroborated by MediaNama's reporting.

The questions that justify AI Mode are the ones you would normally split into four searches. Comparisons across categories. Trip planning with constraints. Code questions that touch two frameworks. Try this as a first prompt:

"Compare the Sony A7CR and Fujifilm X-T5 for travel photography under 1.5kg, prioritizing battery life and weather sealing."

You will get a structured response with inline citations, a follow-up box, and a side panel of supporting links. Ask the follow-up in the same thread. Keep the context. That is the entire workflow.

Search Live for When Typing Is the Wrong Tool

Google's AI Mode product page describes Search Live as voice back-and-forth with AI Mode, with optional video to share visual context about your surroundings. Point your camera at a circuit board, ask which capacitor is bulging, get an answer that references what it is looking at. The use case the marketing materials underplay is repair diagnostics, where a still photo loses the context of which way a connector is oriented.

Connecting Gmail and Photos for Personal Intelligence

Personal Intelligence is the feature that turns AI Mode from a smart search box into something that knows your flight number. Google confirmed at I/O that users can connect Gmail and Google Photos to AI Mode for personalized responses, with Google Calendar integration planned but not available at launch.

To enable it:

1. Open AI Mode on desktop or in the Google app.
2. Open the settings menu and find Search personalization, then Connected Content Apps.
3. Toggle on Gmail and Google Photos individually.
4. Ask a question that requires the connection, such as "What's my flight on Friday and is there a lounge at the connection airport?"

The non-obvious payoff is photo-based recall. "Find the receipt from the restaurant we went to in Lisbon in October" works because AI Mode can read the photo of the bill in your library and cross-reference the date. The Calendar gap is the one significant limitation right now. Without it, you cannot ask AI Mode to reason about your week in any meaningful way, which makes the trip-planning demos Google showed less complete than they look in the keynote.

Google Search AI Agents How to Set Up Background Monitoring

Information agents are the most consequential addition in the 2026 release. TechCrunch's coverage describes them as persistent agents that operate continuously in the background 24/7, framing them as a direct evolution of Google Alerts, which launched in 2003. The pitch is simple. You stop checking. The agent checks.

The Google Search AI agents how to set up flow looks like this:

1. Open AI Mode in the Google app.
2. Enter a monitoring prompt phrased as an ongoing instruction, for example "Keep me updated on nearby movie tickets for 'The Mandalorian and Grogu'."
3. Confirm when AI Mode asks whether you want this turned into a tracked topic.
4. Allow notifications for the Google app if you have not already.
5. Open AI Mode history to see, refine, or disable any active agent.

TechCrunch notes that the Google app sends push notifications when relevant updates appear and that active tracked topics live in AI Mode history, where you can manage them individually. MediaNama reports that the agentic task execution is built on an internal system Google calls Antigravity, which creates persistent dashboards and lightweight task interfaces inside Search. Google demonstrated wedding planning and moving house as the headline use cases.

Access is gated. Google's I/O post states that information agents are launching first for Google AI Pro and Ultra subscribers in the US during summer 2026, with broader rollout later. If you are outside the US or on the free tier, the agent button will not appear yet.

The Agent Failure Mode Nobody Documents

Vague prompts produce noisy agents. "Keep me updated on AI news" will spam your phone within a day, because the model has no scoping signal. The fix is to write monitoring prompts with at least two constraints: a specific entity and a specific event type. "Notify me when Anthropic publishes a new Claude model card" works. "Notify me about AI" does not. If an agent is firing too often, open it in AI Mode history and rewrite the prompt rather than starting over. The history entry preserves the agent's accumulated context.

Deep Search for the Times You Need a Real Report

Deep Search is the heavyweight research mode and the single feature most worth the subscription. Google's product page describes it as a tool that browses hundreds of sites, reasons across them, and produces a fully-cited report in minutes, available only to Google AI subscribers in Labs. Google's support documentation specifies that Deep Search is currently built on Gemini 2.5 Pro and available to Google AI Pro and AI Ultra subscribers in the US in English, on desktop and mobile web.

To run a Deep Search:

1. Confirm your subscription at google.com/ai.
2. Enable Web & App Activity, which the support page lists as a requirement.
3. Open AI Mode, type your question, and select the Deep Search option above the response.
4. Start an unrelated search in another tab while it works. Reports typically arrive in two to five minutes.
5. Find finished reports in AI Mode history.

The practical sweet spot is questions that would otherwise eat 90 minutes of tab-juggling: comparing five vendor security postures, summarizing the regulatory state of a niche topic across three jurisdictions, due diligence on a small company. Use it for breadth, not for precision on a single hard fact.

The Accuracy Problem Google Has Not Fixed

The most important Google AI Mode features 2026 caveat is the one the keynote skipped. MediaNama's launch coverage cites 2026 research showing that generative search engines sometimes cite AI-generated or low-quality sources, and notes that Google's AI Overviews have previously produced inaccurate summaries and buried original source material, with accuracy problems remaining unresolved at the I/O 2026 launch. Google's own AI Mode product page carries the disclaimer that AI Mode is experimental and may make mistakes.

This is not a hypothetical. The earlier glue-on-pizza era of AI Overviews showed how confidently a fan-out system can stitch a wrong answer from correct-looking sources. The defense is mechanical: read the citations on anything that matters, and treat Deep Search reports as a starting outline rather than a finished document. If a claim has only one citation and that citation is a Reddit thread, it has effectively no citation at all.

One counterweight worth knowing. Google's developer documentation states that clicks arriving from search results pages with AI Overviews are higher quality by Google's own testing, meaning users spend more time on destination pages. Whether that holds for AI Mode citations specifically, where the citation panel competes with an in-line synthesis, is a separate question Google has not published data on.

What to Try Tonight

Connect Gmail and Photos, set one information agent with two concrete constraints, and run a Deep Search on something you were already going to research this week. If you write for the web, also read AnIntent's coverage of Google's Gemini Mac app and the broader AI Tools category for how these pieces fit together. For background on the model decisions behind this release, the Google I/O 2026 preview covers the agentic coding push that informed the Antigravity work now powering Search.