Google Turns Search Into an AI Agent Platform
Google has overhauled its Search product into an AI agent platform, rolling out Gemini 3.5 Flash as the default model in AI Mode globally and adding agentic booking, conversational follow-ups, and information agents for paid subscribers.
Google Search is no longer just a search engine. Following its I/O 2026 Search announcements on May 19, 2026, the company has repositioned Search as an AI agent platform powered by Gemini 3.5 Flash—now the default model in AI Mode globally.
The short version: Google Search now uses Gemini 3.5 Flash by default in AI Mode, supports conversational follow-ups from AI Overviews, and will offer agentic booking and information agents to paying subscribers starting this summer.
What Changed in Google Search
The most significant shift is the global rollout of Gemini 3.5 Flash as the default model powering AI Mode. This replaces an earlier default and brings faster, more capable responses to users in nearly 200 countries and 98 languages through the Personal Intelligence expansion.
Google also introduced a redesigned AI-powered Search box that behaves more like a conversational assistant than a keyword input. Users can now follow up directly from AI Overviews without starting a new query—a shift that makes Search sessions more like dialogues than discrete lookups.
For users on Google AI Pro and Ultra subscription tiers, two agentic features are coming this summer in the U.S.:
- Information agents that track topics and surface updates proactively
- Agentic booking that completes transactions—restaurant reservations, appointments—on a user's behalf
Why This Matters for Search Behavior
Google is clearly responding to competition from ChatGPT, Perplexity, and other AI-first search tools by collapsing the distance between finding information and acting on it. Agentic booking is particularly significant: it turns Search from a discovery surface into a completion surface.
Generative UI and coding capabilities were also announced, suggesting Search will eventually render dynamic, structured outputs—not just links or text summaries—for the right query types.
The global scope is notable. Expanding Personal Intelligence to nearly 200 countries and 98 languages signals that Google is not treating AI Search as a U.S.-first premium product. It is the default experience, worldwide.
What's Still Limited
Agentic booking and information agents are subscription-only features, at least initially. Users on the free tier will get AI Mode and conversational follow-ups but not the fully agentic capabilities. Google has not confirmed a timeline for broader access.
FAQ
Is AI Mode now the default in Google Search globally?
Gemini 3.5 Flash is the default model in AI Mode globally as of May 2026, following Google's I/O announcement. AI Mode itself has been expanding as a standard interface rather than an opt-in feature.
What is agentic booking in Google Search?
Agentic booking lets Google Search complete transactions—like restaurant reservations or appointments—on a user's behalf, without the user needing to navigate to a third-party site. It is launching in the U.S. for Google AI Pro and Ultra subscribers in summer 2026.
Does Google Search now support conversational follow-ups?
Yes. Users can ask follow-up questions directly from AI Overviews, allowing a search session to proceed like a conversation rather than requiring a new query for each step.
