Antigravity CLI (agy) is Google’s terminal coding agent. It launched on May 19, 2026 as the successor to Gemini CLI and uses the same agent engine as the Antigravity 2.0 desktop app. Free and Google AI Pro/Ultra users were moved to it when Gemini CLI stopped serving them on June 18, 2026.

It moves fast: version 1.5.0 shipped on November 4 and 1.5.9 on November 14. It isn’t open source; the public GitHub repository holds the README, changelog and issue tracker only.

Who it’s for

Google recommends it for interactive, multi-agent coding with Gemini 4 Argon and above, whether you’re on a free account, Google AI Pro or Ultra, or Google Cloud. If you used Gemini CLI with a personal Google account, this is where you’ve been moved.

What stands out

  • One engine with the desktop app. It shares settings with Antigravity 2.0 and can hand a session over to the app.
  • Background agents. Written in Go, it runs several agents on tasks at once in the background.
  • Works in your IDE. agy acp lets Zed, JetBrains IDEs, Android Studio and Xcode run the agent in their own panel.
  • Built for SSH. It detects remote sessions, prints a sign-in link, and keeps credentials in the system keyring.
  • Plugins, skills, hooks and subagents. Gemini CLI extensions become plugins, installable from a marketplace, a GitHub URL or a folder.
  • Claude on paid plans. Claude Sonnet 5.5 and Opus 5.5 are available on paid Pro, Ultra and Enterprise, alongside Gemini 4.

Drawbacks and things to watch

  • Limits aren’t published. Google describes weekly rate limits by plan but gives no numbers.
  • Defaults keep changing. Since 1.5.7, sessions with no saved mode, including headless -p runs, start in Auto mode. Choose Default under Agent Mode in /config to undo it.
  • Models leaving. Claude 4.6 models and GPT-OSS 120B are removed on November 18, 2026.
  • No compliance certifications. Google says Antigravity in Gemini Enterprise doesn’t support SOC 1/2/3, ISO 27001 or ISO 42001, or FedRAMP.
  • Remote MCP needs Streamable HTTP. Older SSE servers aren’t supported, even though Google’s migration guide shows an SSE example.

Privacy and security

On personal plans, Google uses your interactions to improve its products and its staff may review them; you can opt out with the Telemetry setting, though Google still uses data to run the service. Enterprise sessions run under Google Cloud’s terms with data residency, VPC Service Controls and telemetry logged to your own project. No zero-retention option is documented.

Getting started

On macOS or Linux, run curl -fsSL https://antigravity.google/cli/install.sh | bash; on Windows, irm https://antigravity.google/cli/install.ps1 | iex in PowerShell. Then run agy and sign in with your Google account.

Plans and prices

Antigravity CLI plans
PlanPriceWhat you get
Individual$0Unlimited tab completions and command requests, basic weekly rate limits.
Google AI Plus$4.99/moSame Antigravity models as the free tier.
Google AI Pro$19.99/moHigher rate limits, flexible AI credits, Gemini 4 Argon. Claude models on paid (not trial) Pro.
Google AI Ultra$99.99 or $199.99/moHighest limits and Gemini 4 Carbon; the $199.99 tier has 20x AI Pro usage.
Business (Google Cloud)From $30/seat/mo, or pay-as-you-goThe plan Google's pricing page explicitly ties to the CLI.

Antigravity CLI FAQ

Is Antigravity CLI free?

Yes. The free Individual tier includes Gemini 4 Hydrogen and Gemini 3.8 Flash, unlimited tab completions and command requests, and basic weekly rate limits. Google doesn't publish the exact limits.

How do I move from Gemini CLI to Antigravity CLI?

Install agy and run it: on first launch it offers to convert your extensions and settings. Run agy plugin import gemini to turn extensions into plugins and move MCP servers into mcp_config.json. GEMINI.md and AGENTS.md files work unchanged, but workspace skills move from .gemini/skills to .agents/skills.

Can I use my own Gemini API key?

Yes. Set modelProvider to gemini in the CLI settings and export GEMINI_API_KEY, and requests go straight to the Gemini API without an account session. Vertex AI through application default credentials also works. Keys for non-Google providers aren't supported.

Does Google train on my Antigravity code?

On personal plans, Google uses your interactions to improve its products and staff may review them unless you turn off the Telemetry setting. Business and Gemini Enterprise users are covered by Google Cloud's terms instead.

Is Antigravity CLI open source?

No. Unlike Gemini CLI, it isn't open source; its public GitHub repository holds only the README, changelog and issue tracker.

Latest changes

Nov 14, 2026securityAntigravity CLI 1.5.9 stops MCP auth headers leaking on redirectsNov 13, 2026modelAntigravity CLI 1.5.8 adds Gemini 4 Hydrogen and Carbon, with two security fixesNov 12, 2026securityAntigravity CLI 1.5.7: Auto becomes the default mode, and an admin-review bypass is fixedNov 4, 2026releaseAntigravity CLI 1.5.0 can run as an editor agent server and on remote agentsOct 13, 2026modelGemini 4 Argon arrives in Antigravity and Antigravity CLISep 10, 2026releaseAntigravity CLI 1.2.0 can run Remote Control as a background serviceJul 8, 2026releaseAntigravity CLI 1.1.0 makes review-before-write the default

Sources

Facts last checked November 14, 2026.