“AI Search Drastically Changed in 3 Months” ── Piece Company Inc. Releases Free “Spring 2026 LLMO/GEO/AIO Report” for SMEs, Following Gemini 3.1 and AI Mode Evolution

Piece Company Inc. (Head office: Kashima City, Saga Prefecture; Representative Director: Kazuhiko Koga) has released the "2026 Spring AI Search Countermeasures (LLMO/GEO/AIO) Latest Trends Report" free of charge on its official website, based on the trends observed over approximately three months since the launch of its corporate support service "LLMO/GEO/AIO Consulting," which addresses AI-generated search responses.

Since the release of the previous winter edition (January 2026), the AI search environment has dramatically changed in just three months. With the integration of Gemini 3 into Google's "AI Mode," the announcement of the latest model "Gemini 3.1 Pro," and continuous core updates, the "mechanism of search" has been quietly evolving without businesses even realizing it.

This report avoids technical jargon as much as possible, explaining "industry movements that businesses should know this spring" organized into four key changes.

▼ Click here for the full "2026 Spring AI Search Countermeasures (LLMO/GEO/AIO) Latest Trends Report" (Free)
https://piececompany.com/ai-search-report-2026-spring/

■ What's the Difference Between "LLMO, GEO, and AIO" in the First Place?

These three terms have been frequently heard recently. While they seem similar, their scopes differ. Our company supports businesses in their AI search countermeasures comprehensively by addressing all three.

LLMO (Large Language Model Optimization)
This is optimization for conversational AIs such as ChatGPT, Claude, and Gemini, ensuring that your company is cited by them. The key point is: "When your company name is asked in ChatGPT, is it correctly introduced?"

GEO (Generative Engine Optimization)
This is optimization for generative AI search engines in general, such as Perplexity and AI Mode. The goal is for your company to be displayed as a source in their answers.

AIO (AI Optimization)
This is optimization for AI answers integrated into traditional search results, such as Google's AI Overview. More important than ranking first in search is being introduced within AI answers.

In short, it's simple to remember: LLMO is for "conversational AI," GEO is for "AI search engines," and AIO is for "the AI part of search results." Although there are many overlapping aspects, the optimal strategies for each differ subtly. Therefore, "not just one" but "all three in parallel" is the correct approach in the era of AI search.

■ "Four Major Changes" That Occurred in These Three Months

Change ①: Google AI Mode Integrated with the Latest AI "Gemini 3" (January 2026)
"AI Mode," which became available in Japanese in September 2025, is a new search experience that provides answers in a conversational format with AI, in a separate tab from traditional search results. With the integration of the latest "Gemini 3" in January 2026, the accuracy of AI-generated answers has significantly improved.

The key point for businesses to note is the fact that "the zero-click rate exceeds 90%" in AI Mode (Semrush survey). This means that unless your company is introduced in AI Mode, clicks to your site will be almost non-existent. A shift in mindset from "improving rankings" to "being cited by AI" is essential.

Change ②: Even Smarter "Gemini 3.1 Pro" and "Deep Think" Emerged (April 2026)
In April 2026, Google announced the highly versatile "Gemini 3.1 Pro" and "Gemini 3.1 Pro Deep Think," specialized in complex reasoning.

What does this mean for businesses? It means that AI will evaluate sites "smarter" and "more strictly." This phase demands more than superficial information; deep expertise, primary information, and unique experiences will be increasingly scrutinized.

Change ③: Continuous Core Updates Shift Evaluation Criteria
Since the beginning of 2026, Google has carried out large-scale updates consecutively: "February 2026 Discover Core Update" and "March 2026 Core Update."

It is noteworthy that Google officially stated, "Even in AI Mode and AI Overview, the evaluation is based on traditional SEO best practices." This means no special tricks are needed; sincere site operation based on "Experience, Expertise, Authoritativeness, Trustworthiness" (E-E-A-T) remains the legitimate strategy in the AI era.

Change ④: Microsoft Released Copilot Citation Report Function
Bing Webmaster Tools now includes a feature to report when your site is cited by Microsoft Copilot.