Google Antigravity CLI
The Complete Guide
Gemini CLI is dying June 18, 2026. Antigravity CLI replaces it — with multi-model support, a free tier, and real agent capabilities. Here's everything you need to know.
What Is Google Antigravity CLI?
Google Antigravity CLI (binary: agy) is Google's terminal-first AI coding agent, launched May 19, 2026. It replaces the Gemini CLI, which sunsets for individual users on June 18, 2026.
Unlike the Antigravity 2.0 desktop IDE, the CLI runs entirely in your terminal. It shares the same agent engine — meaning you get multi-step reasoning, multi-file editing, tool calling, MCP server support, and conversation history, all keyboard-driven.
Key Features
Default: Gemini 3.5 Flash (Medium). Switch to Claude 3.6 Opus or GPT-5.5 with one click when Gemini hits a wall.
Install plugins with MCP servers, hooks, skills, and sub-agents. agy plugin import gemini migrates your old extensions.
Built-in sandbox uses nsjail (Linux), sandbox-exec (macOS), AppContainer (Windows) to isolate agent commands.
Use /add-dir to expand context across multiple project directories, similar to Claude Code.
How to Install Antigravity CLI
Works on Linux, macOS, and Windows. You need a Google account (free works).
macOS / Linux
$ curl -fsSL https://antigravity.google/install.sh | sh
# Verify installation
$ agy --version
# Sign in with Google
$ agy auth login
# Start coding
$ cd your-project && agy
Windows (PowerShell)
PS> irm https://antigravity.google/install.ps1 | iex
# Verify and authenticate
PS> agy --version
PS> agy auth login
⚠️ VM Users: One Common Error
On virtual machines without AES hardware instructions, the CLI will crash on startup. Fix: enable AES-NI in your VM settings (VirtualBox: Settings → System → Processor → Enable PAE/NX).
Antigravity CLI Pricing (June 2026)
Google account required. Generous rate limits during preview period. Default Gemini 3.5 Flash model.
All models: Gemini 3.5, Claude 3.6 Opus, GPT-5.5. High rate limits. Previously the $249.99 tier — now much cheaper.
Teams on Code Assist Standard/Enterprise keep Gemini CLI alive with continued model updates. No migration needed.
If you currently pay for Claude Code Max ($200/mo) + Codex (included with ChatGPT Pro $200/mo), switching to Antigravity Ultra ($99.99/mo) gives you access to all three models for less than half the cost. Many power users run Antigravity as primary and keep a single Claude Pro ($20/mo) as backup.
Antigravity CLI vs Alternatives (June 2026)
| Feature | Antigravity CLI | Claude Code | Cursor 3.5 | GitHub Copilot |
|---|---|---|---|---|
| Price | Free / $99.99 Ultra | API / $200 Max | $20 Pro / $40 Ultra | $10-$39/mo |
| Default Model | Gemini 3.5 Flash | Opus 4.7 | Composer 2.5 | GPT-4o / Claude |
| Multi-Model | ✅ Gemini + Claude + GPT | ❌ Claude only | ✅ GPT + Claude | ✅ Multiple |
| Interface | Terminal (TUI) | Terminal | IDE (VS Code fork) | VS Code plugin |
| Free Tier | ✅ Yes | ❌ No | ✅ Limited | ✅ Limited |
| MCP Support | ✅ Native | ✅ Plugin marketplace | ✅ Yes | ⚠️ Limited |
| Sandbox | ✅ Built-in (nsjail) | ⚠️ Manual | ✅ IDE sandbox | ❌ No |
| SWE-bench | ~72% (est.) | 80.8% 🏆 | 75% (Composer 2.5) | ~70% |
| Best For | Budget-conscious devs who want multi-model | Pure code quality, agentic loops | IDE-first, multi-file refactor | Teams, GitHub ecosystem |
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Get TrendPulse Signals → $29/moMigrate from Gemini CLI → Antigravity CLI
Migration deadline: June 18, 2026. After this date, Gemini CLI stops working for individual accounts.
# Converts extensions, MCP servers, skills, hooks
# Same Google account as Gemini CLI — OAuth tokens transfer
# Verify your plugins and settings work before using on real projects
/model gemini-3.5-flash # default
/model claude-3.6-opus # for hard bugs
/model gpt-5.5 # alternative reasoning
Which AI Coding Tool Should You Use?
The cheapest way to access Gemini 3.5 + Claude + GPT in one terminal tool. Free tier is generous. $99.99 Ultra is a steal compared to stacking individual subscriptions. Great for SSH workflows and budget-conscious developers.
The absolute best code quality. SWE-bench leader at 80.8%. Opus 4.7 is unmatched for complex refactoring and multi-file agentic loops. Worth the $200/mo if coding is your full-time job and you need the highest accuracy.
An IDE-first experience with Cloud Agents. Best for developers who want autocomplete + agents in the same window. $20/mo Pro is the sweet spot for most developers. Composer 2.5 is excellent for multi-file refactors.
The most proven, widely-adopted option with deepest GitHub integration. Best for teams already on GitHub. $10/mo individual is the cheapest paid option. Agent mode is now GA with BYOK support.
Frequently Asked Questions
agy plugin import gemini to convert extensions to the new plugin format. MCP servers, skills, and hooks migrate over. The file layout changes from ~/.gemini/ to ~/.gemini/antigravity-cli/. Always test after migration.🔥 Stay ahead of every AI tool change
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