Exploring Google Antigravity: AI‑First IDE for Rapid Front‑End Prototyping

What Is Antigravity?

Google Antigravity, released in November 2025, is an "agent‑first" AI‑driven IDE that treats AI agents as real developers. Unlike traditional code‑completion plugins, agents can plan tasks, write code, run tests, and verify results.

Agent‑First Architecture

Multiple AI agents collaborate, each acting as an autonomous developer. The system generates Artifacts —task lists, implementation plans, screenshots, screen recordings, and validation results—so users can visualize and audit agent actions.

Manager View

Beyond the standard editor, Antigravity provides a Manager interface that lets users run several agents in parallel across different workspaces (e.g., one for code, one for documentation, one for testing).

Multi‑Model Support

Although a Google product, Antigravity is not limited to Gemini models. It currently supports Gemini 3 Pro , Claude Sonnet 4.5 , and the open‑source GPT‑OSS model.

Public Preview

Public preview version at launch.

Available on Windows, macOS, and Linux.

Generous quota: rate limits refresh every five hours.

Installation

Download the appropriate version from the official site and follow the setup guide. Antigravity is built on VS Code, so users familiar with VS Code or Cursor can transition smoothly.

https://antigravity.google/download [1]

Remember to enable TUN mode; otherwise the Google login step may hang.

Hands‑On Demo

Prototype Generation

The author reused prompts from a previous article about creating a UI prototype for a "Fitness Pilates" iOS app. The prompt asks the agent to act as a full‑stack engineer and output a complete set of HTML pages using Tailwind CSS, Font Awesome, and Unsplash images.

你是一名精通 UI 设计和产品规划的全栈工程师，你的目标是完成一个"健身普拉提"iOS App 的开发。

你的核心任务是输出一套完整的APP原型图（HTML页面形式）来辅助后续的开发任务。

核心执行点：
- 明确功能与页面： 请你构思并确定"健身普拉提"App的核心功能模块。基于这些模块，规划出需要设计的HTML页面清单。
- 产品与UI/UX设计：
  - 以产品经理的视角规划APP的关键功能、页面流程和交互逻辑。
  - 以设计师的视角输出符合现代iOS App风格的、美观且用户友好的UI/UX。
技术规范：
- 使用 HTML5、Font Awesome、Tailwind CSS 和必要的 JavaScript（用于基础交互）。
- 图片素材请使用 Unsplash。
- 代码应简洁，注重可读性。
输出要求：
- 创建一个包含多个 HTML 页面的原型。
- 主页面命名为 index.html，它可以整合或跳转到其他页面。
- 非主页面HTML文件使用其对应的核心功能名称进行命名（英文，例如 courses.html, profile.html）。
- 每个页面均需采用 iOS App 的风格生成。
- index.html 中，每行展示两个主要功能模块的入口或页面预览。
- 所有输出（包括代码内注释和页面文本）永远用简体中文。
- 请以顶级UX的眼光和审美标准，创造令人满意的设计。

The agent used the Planning mode with Gemini 3 Pro (High) to generate a task.md file containing the full task list, followed by an implementation_plan.md that outlines goals, tech stack, and step‑by‑step actions.

Resulting prototype screenshots show a fully designed UI, navigation, and component layout.

Corporate Website Generation

A second prompt asked Antigravity to build a software studio website using Next.js 16, Tailwind 4, and shadcn/ui. The required sections include a navigation bar, footer, hero, services, and call‑to‑action blocks.

使用 Next.js 16、Tailwind 4 以及 shadcn/ui 帮我完成一个软件开发工作室的企业官网，具体要求如下：
1. 导航栏包含首页、我们的服务、联系我们、关于我们
2. 网站底部 Footer 包含资源、公司、法律
3. 使用 tailark 官网中的营销组件，让界面更加合理美观，例如：在首页完成 Hero Section、Services Section、 Call To Action 等 blocks
4. 页面中保证每个 block 居中展示

The first generation produced a basic layout with the requested sections. The author then switched to Fast mode to add a dark‑mode theme.

https://github.com/flyeric0212/gemini-3-pro-demo [1]

Conclusion

In front‑end tasks, Gemini 3 Pro performed exceptionally, often delivering the desired result in a single pass. Antigravity supports both Planning and Fast modes; use Planning for complex, from‑scratch projects and Fast for quick tweaks or bug fixes.