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Google Gemini 3 Complete Guide: New Models, Google Assistant's End, Apple Siri Partnership, and the AI Agent Era

2026-01-21濱本

Google Gemini 3 Flash and Pro become the new default models in 2026, Google Assistant shuts down in March 2026, Gemini technology is licensed to Apple Siri, and agentic AI features are in active testing via Gemini Labs. A complete overview of Google's AI platform shift.

Google Gemini 3 Complete Guide: New Models, Google Assistant's End, Apple Siri Partnership, and the AI Agent Era
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This is Hamamoto from TIMEWELL.

In 2026, Google Gemini has entered a new phase. Gemini 3 Flash and Gemini 3 Pro are the new default models, Google Assistant shut down in March 2026, a partnership to supply Gemini technology to Apple's Siri was announced, and agentic AI features are actively being developed. This article covers the full scope of these changes and what they mean for enterprise use.

Google Gemini 2026: Key Facts

Item Details
Current models Gemini 3 Flash (default), Gemini 3 Pro
Assistant shutdown March 2026
Apple partnership Gemini technology licensed for Siri
Android Auto Gemini integrated
Google TV Gemini features announced at CES 2026
Agent features Testing in Gemini Labs

Gemini 3: Flash and Pro

Gemini 3 Flash

Gemini 3 Flash is the new default model in the Gemini app.

Characteristics:

  • Substantial capability improvement over Gemini 2.5 Flash
  • Fast, efficient processing
  • Cross-modal reasoning across text, images, audio, and video
  • Described by Google as "the best vibe coding model"

Gemini 3 Pro

Gemini 3 Pro provides frontier reasoning capability for complex problems.

Characteristics:

  • Advanced reasoning on complex problems
  • Optimized for mathematics, coding, and scientific analysis
  • Available to all users

When to Use Each

Model Best for
Gemini 3 Flash Everyday tasks, speed-sensitive work
Gemini 3 Pro Complex analysis, deep reasoning requirements

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Google Assistant's End — Complete Transition in March 2026

Timeline

Google Assistant completed its shutdown for mobile devices in March 2026.

Transition schedule:

  • Late 2025: Migration to Gemini begins
  • March 2026: Final Assistant shutdown
  • Coverage: Android 10 or later, 2GB+ RAM devices

Devices Not Covered

Devices running Android 9 or earlier, or with under 2GB of RAM, continue using Assistant. These older hardware configurations can't deliver an adequate Gemini experience.

Android Auto Integration

Gemini has also replaced Assistant in Android Auto.

New capabilities:

  • Continued hands-free operation
  • Conversational AI assistant with context retention
  • More natural multi-turn dialogue
  • More complex task handling

Apple Siri Partnership — A Strategic Signal

What Was Announced

In January 2026, Apple reported plans to use Google Gemini to power a revamped Siri.

Details:

  • Google's Gemini and cloud infrastructure support Apple's foundation models
  • Privacy maintained through Apple Private Cloud Compute
  • Multi-year partnership

Strategic Implications

For Google:

  • Gemini deployed beyond first-party devices
  • Positions Google as an AI infrastructure provider
  • Revenue diversification beyond search and advertising

For Apple:

  • Addresses AI capability gap without waiting for internal development to catch up
  • Acknowledges competitive reality
  • Privacy framework preserved while gaining capability

The deal reframes how to think about Gemini: not only as a product competing with Siri, but as infrastructure that can run inside Siri. Google is building toward a position analogous to how cloud providers supply infrastructure to competitors.

Agentic AI — From Answering to Acting

Gemini Labs

Code from the Google app revealed a section called Gemini Labs — analogous to Google Labs, a space for testing experimental features before broader release.

Features currently in testing:

  • New Gemini Live capabilities
  • Live Thinking mode
  • Deep Research tools
  • Agentic AI features

Autonomous Task Execution

Code signals indicate an "agent" mode in development that would allow Gemini to execute tasks on the user's behalf.

Capabilities under development:

  • Changing device settings
  • Launching applications
  • Handling routine tasks autonomously
  • Operating the smartphone on behalf of the user

This represents the shift from AI that answers questions to AI that takes actions — a fundamental change in how the assistant integrates with daily work.

Google TV Integration — CES 2026

New Gemini Features

At CES 2026, Google previewed Gemini features for Google TV.

New capabilities:

  • Visually rich response framework
  • Responses incorporating images, video, and real-time sports updates
  • Information presentation adapted to query type

Requirements

Google TV devices need Android 14 or later — which means most existing devices will require a firmware update.

Supporting Infrastructure: TPU Ironwood, Google Beam, Project Mariner

7th-Generation TPU "Ironwood"

Google's latest TPU achieves 10x performance improvement over the previous generation.

Characteristics:

  • Dramatically increased compute capacity
  • Large-scale data processing
  • Accelerated AI model training
  • High-complexity real-time calculation

Google Beam

Google Beam enables AI-first video communication.

Characteristics:

  • Multi-angle capture via 6 cameras
  • AI-integrated processing of video streams
  • Real-time 3D light field display
  • 60fps, millimeter-precision head tracking

Project Mariner

Project Mariner powers the agentic features with multi-task capability and "teach and repeat" functionality.

Characteristics:

  • Learning similar tasks from a single instruction
  • Web-based information retrieval
  • Integration with other services via MCP (Model Context Protocol)

Then vs. Now: Gemini's Evolution

Item Early 2025 January 2026
Models Gemini 2.5 Flash/Pro Gemini 3 Flash/Pro
Assistant Transition beginning Shut down March 2026
Apple partnership None Siri technology supply
Agent features Limited Testing in Gemini Labs
Android Auto Separate system Gemini integrated
Google TV Basic features Gemini-enabled (CES announcement)

Enterprise Applications

Business Use Scenarios

1. Video communication

  • Immersive meetings via Google Beam
  • Real-time translation for global communication

2. Workflow automation

  • Task automation via Project Mariner
  • Routine business processing through agentic features

3. Development efficiency

  • Coding assistance via Gemini Code Assist
  • Large-scale code updates via Jules (asynchronous code agent)

4. Creative production

  • Image generation via Imagen 4
  • Voice generation via VO3
  • Video editing via Flow

Summary

In 2026, Google Gemini is evolving from "AI assistant" to "AI platform."

Key points:

  • Gemini 3 Flash/Pro are the new default models
  • Google Assistant shut down in March 2026
  • Gemini technology licensed to Apple Siri
  • Agentic AI features in active testing via Gemini Labs
  • Google TV integration announced at CES 2026
  • Infrastructure reinforced through TPU Ironwood, Google Beam, and Project Mariner

The combination of Google Assistant's end and the Apple partnership signals Google's shift from "our services" to "AI infrastructure." Gemini 3 isn't just a version upgrade — it represents a potential redefinition of what an AI assistant is and does.

For enterprises, Gemini's evolution opens new possibilities across workflow automation, communication, and creative production. The arrival of the agentic AI era makes now the time to assess how Gemini fits into your organization's workflow.

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