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Google Antigravity Explained: App, CLI, IDE Extensions and SDK

Google Antigravity is Google's agentic development platform, where AI agents take on coding tasks, work in parallel and report back with plans, diffs and browser recordings. It isn't one app but four surfaces, the Antigravity App, the Antigravity CLI, extensions for IDEs and a Python SDK, and as of November 2026 they all run on the same agent harness.

If you tried Antigravity in 2025, the name covers more than the editor you remember. The original Antigravity IDE and the Antigravity 2.0 App are two separate desktop apps, and the App has no IDE in it.

Four surfaces on one agent harness

Google describes the App as a desktop command centre for running several local agents in parallel. It groups conversations into Projects, works across multiple workspaces and can automate routine jobs with scheduled messages. The CLI is the lightweight, terminal-first option for running coding agents, shell commands and background subagents from the keyboard.

Underneath, every surface shares one agent harness that Google says is co-trained with Gemini models. Subagents run in parallel across isolated Git worktrees, so a background job doesn't block the terminal or editor you're working in, and agents report back with interactive implementation plans, multi-file diffs and browser session recordings.

SurfaceWhat you getVersion, as of November 2026
Antigravity App (2.0)Desktop command centre for parallel agents, with no IDE inside2.28.2, for macOS 12 or later, Windows 10 or later and Linux
Antigravity CLITerminal client, run with the command agy1.4.10
IDE extensionsAdd-ons for VS Code, Visual Studio, JetBrains, Zed, Xcode and EclipseListed per editor on the download page
Antigravity IDE (standalone)The original editor with its Agent Manager2.6.0
Antigravity SDKPython library in preview, installed with pip install google-antigravity0.1.23

The SDK gives programmatic access to the same agent runtime that the 2.0 App and the CLI use. Antigravity also comes pre-installed on Googlebook laptops, where you update or reinstall it through Google Play.

What the 2.0 split changed

The Antigravity IDE launched in November 2025 with a surface called the Agent Manager, and Google says millions of developers adopted it. Then on May 19, 2026, Antigravity 2.0 arrived as a new standalone desktop app for macOS, Linux and Windows. Google's launch post says there's no IDE in it. If you had the IDE installed, its next update prompts you to move to 2.0 and asks whether you want to keep the IDE too, which Google recommends for developers.

Google gave three reasons for splitting them. Coding would expand into general knowledge work. Tying an editor and an agent-first surface into one application would confuse people who aren't used to code. And the product, the agent harness and the models had to be developed together. What arrived with 2.0:

  • Dynamic subagents that the main agent defines and calls for focused subtasks, without filling its own context window.
  • Asynchronous task management, plus hooks written in a simple JSON format.
  • Scheduled Tasks, which trigger agents on a cron-style schedule.
  • Projects instead of repositories: one project can cover several folders and enforce its own agent settings and permissions.
  • Slash commands such as /goal (keep going until the task is finished), /grill-me (ask questions before building), /schedule and /browser.
  • Live transcription for voice input, instead of recording an audio file and passing it to the model.

The editor didn't disappear. On August 20, 2026 Google released Antigravity extensions for Visual Studio Code, Visual Studio, Zed, JetBrains and Xcode, because you still need an editor to inspect code and step through it with a debugger. For a wider view of what to open your projects in, our code editor roundup covers the field.

Which models come with which plan

The models you can pick depend on your plan. As of November 2026 the docs list Gemini 4 Argon, Gemini 3.8 Flash, Gemini 3.7 Flash, Gemini 3.6 Flash and Gemini 3.1 Pro, plus Claude Sonnet 5.5, Claude Opus 5.5 and GPT-OSS 120B. You can set a thinking level of Low, Medium or High on each turn. The models page spells out plan access for the headline ones:

ModelFree planGoogle AI ProGoogle AI Ultra and Enterprise
Gemini 4 ArgonNoYes, or on trial with eligible premium devicesYes
Gemini 3.8 FlashYesYesYes
Claude Sonnet 5.5 and Claude Opus 5.5NoYes, with a footnote on the models pageYes

Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS 120B are marked for removal on November 2, 2026, so don't build around them. If Argon is the reason you're looking, here's how to use Gemini 4 Argon once you're on a paid plan.

Plans and quotas in plain words

Every plan gets Gemini models as the core agent, unlimited Tab completions and every product feature, scheduled tasks and the CLI included. The difference is quota. Google AI Ultra gets the highest quota, refreshed every five hours, plus third-party models. Google AI Pro gets a generous quota refreshed every five hours until it hits a weekly limit. Everyone else gets a weekly quota.

Limits depend on available capacity and on how much work the agent does per prompt, so a simple task uses less than a complex one, and Google says limits are subject to change. AI credits are an overage option only for Pro and Ultra users, controlled by a setting with Never and Always choices. There's no bring-your-own-key option. If the free plan is your real question, I've covered whether Google Antigravity is free on its own page.

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Who's allowed to sign in

  • Personal Google Accounts can use Antigravity on any plan, including the free tier.
  • It's unavailable to anyone under 18.
  • Your account must be tied to a country or territory where Antigravity is offered.
  • Work or school accounts, such as Google Workspace, need an administrator to provision Antigravity first.

The company route: Gemini Enterprise

There's no custom-contract organisational tier. Teams use Antigravity under Google Cloud terms through Gemini Enterprise. The docs list Google Cloud single sign-on, bring-your-own-identity through Workforce Identity Federation (Okta is the example given), regional data residency in the US and EU, VPC Service Controls, and request and telemetry logging.

Google says enterprise use is governed by the Google Cloud Terms of Service and that prompts, code and transcripts aren't used to train models. The catch: enterprise sign-in works in the App, the CLI and the IDE extensions, but not in the standalone Antigravity IDE.

The newest pieces: plugins and Remote Control

On October 29, 2026 Antigravity launched a plugin directory across the App and the CLI. A plugin bundles skills, MCP servers, rules, hooks and custom agents into one installable unit, so you stop configuring each repository by hand. Remote Control, announced on August 21, 2026, lets you drive Antigravity sessions running on your laptops, servers and desktops from a web browser, with access to the files, build tools and environment of the machine running the session.

Getting started in four steps

  1. Download the App from the download page, or install the CLI with the one-line installer.
  2. Sign in with a personal Google Account, or ask your administrator to provision it.
  3. Open a project folder, pick a model and thinking level, and describe the outcome you want.
  4. Review the plan, the diff and any recording before you accept changes.

Where I'd start

I'd start on the free plan in the App, because it's the full-featured surface and every plan gets every feature. I'd only add the CLI if your developers already live in a terminal. Keep the standalone IDE if you want an editor with the agent built in, but if your company signs in through Gemini Enterprise, I'd use an extension in the editor your team already has, because enterprise sign-in doesn't reach the standalone IDE. And I wouldn't promise anyone Gemini 4 Argon or the Claude models until you know which paid plan you're on.

If your team is weighing Antigravity against the tools it already uses and wants the plan, privacy and training questions settled first, that's the kind of thing I help with. I run AI training and workshops for teams, and help businesses with AI enablement, AI automation and GEO, which is about getting your business seen and cited in AI answers. Most of that work is with SaaS marketing teams, telecom companies and small businesses. Here's how we can work together.

Related: app development: guidelines and how to pitch.

Frequently asked questions

Is Google Antigravity free?

Personal Google Accounts can use Antigravity on any plan, including the free tier, as of November 2026. Every plan gets Gemini models, unlimited Tab completions and every product feature, but Gemini 4 Argon and the Claude models need a paid plan.

What's the difference between Antigravity 2.0 and the Antigravity IDE?

Antigravity 2.0 is a standalone desktop app for running agents, with no IDE in it. The Antigravity IDE is the original editor from November 2025, and it's still available as a separate app.

Can I use Claude models in Google Antigravity?

Yes, on paid plans. The models page lists Claude Sonnet 5.5 and Claude Opus 5.5 on Pro, with a footnote, and on Ultra and Enterprise, but not on the free plan.

Does Google train on code written in Antigravity?

For enterprise use, Google says prompts, code and transcripts aren't used to train models, and use is governed by the Google Cloud Terms of Service.

Published and maintained by the Lilach Bullock team, covering marketing, AI and business growth.
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