Google Antigravity | I/O 2026 Keynote

Watch Varun Mohan’s live demo of Google Antigravity from Google I/O 2026. See how this agent-first development platform empowers developers to build with agents and Gemini 3.5 Flash.

Varun demonstrates how the new Google Antigravity is unabashedly agent-first, focusing on the core agent conversations, agent-produced artifacts, and multi-agent orchestration.

Watch the full Google I/O 2026 keynote here: https://youtube.com/live/wYSncx9zLIU

Get started with Google Antigravity: https://antigravity.google/

0:08 – Introduction to Agentic Development

0:30 – Expansion of Antigravity

1:32 – Antigravity 2.0 Overview

2:29 – Building an OS with Gemini 3.5 Flash

4:21 – Operating System Live Demo

5:12 – Antigravity 2.0 UI Tour

6:00 – Solving Complex Engineering Tasks

7:06 – Speed Optimization and Global Availability

#GoogleIO #GoogleAntigravity #Developer #AIStudio

Gemini 3.5 Flash stands out as a high-performance, cost-efficient model specifically engineered for speed and agentic workflows. According to the keynote (2:21–2:26) and external analysis, it is designed to bridge the gap between high-speed utility and frontier-level intelligence.

Key Features

Extreme Speed & Throughput: Gemini 3.5 Flash is noted for being 4x faster than other frontier models, delivering high-speed responses crucial for real-time interactions and high-volume production tasks.
Agentic Capability: It is co-optimized with the Antigravity agent harness to excel at planning, executing, and iterating through multi-step engineering workflows autonomously (2:06–2:19).
Cost Efficiency: It provides significant value for developers, notably demonstrated in the keynote where building a fully functional operating system cost less than $1,000 in API credits—a task previously deemed impossible on earlier models like Gemini 3.1 Pro (3:32–3:45).
Large Context Window: It supports a 1M token context window, allowing it to process massive inputs like full codebases or long video/audio files in a single pass.
Optimized Performance: In the Antigravity development environment, the model is further optimized to run up to 12x faster, addressing the “token-heavy” nature of agentic coding (7:16–7:26).

Why it is Special

Unlike standard models, 3.5 Flash is “unabashedly agent-first,” meaning it performs best when managing autonomous teams of sub-agents that generate, execute, and test code concurrently (2:52–3:04, 3:52–4:00). Its combination of low latency and high accuracy makes it the engine behind complex, rapid engineering feats that would otherwise take months of human