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Antigravity CLI

Replaced Gemini CLI; multi-model, parallel execution.

Verified: Sep 13last change: Sep 23next price check: Dec 12

Price
free with limits / Pro $20 / Ultra $249.99
License
closed-source, Go
Model
Gemini 3.1 Pro · Claude Sonnet 4.6 и Opus · GPT-OSS 120B
model under the hood
Gemini 3.1 Pro · score 7.33 →
Antigravity CLI 1.1.2: the model switched itself, Gemini 3.5 Flash no longer available
Antigravity CLI 1.1.2: the model switched itself, Gemini 3.5 Flash no longer available

Facts with sources

  • On June 18, Gemini CLI was shut down and Antigravity CLI replaced it. Source (in Russian)
  • After a region check was added, it stopped working from Russia even with a VPN. Source (in Russian)
  • The model inside can change without notice: in the screenshot, Gemini 3.5 Flash is already unavailable. Source (in Russian)

Strengths

  • One terminal agent with Gemini Flash and Pro, Claude Opus and Sonnet and GPT-OSS inside; /model switches, with low/medium/high effort.
  • A free tier with limits: Roaming Rebel's fresh account showed 100% quota without buying credits, tracked with /usage.
  • Parallel subagents: one writes backend tests while another scaffolds a frontend component, monitored from the terminal via /agents.
  • Project rules in GEMINI.md, MCP servers, hooks and skills; extensions for VS Code, JetBrains, Visual Studio, Zed and Xcode.

Weaknesses

  • Quota is split into two pools (Gemini vs Claude/GPT-OSS) with weekly and 5-hour caps; a multi-file agent task drains it faster.
  • Google says availability and limits depend on the account and may change; its predecessor Gemini CLI was shut down on 2026-06-18.
  • The Claude models on offer are, per Gary Judge, only slightly older versions, not the latest.
  • Setup requires a Google sign-in and pasting an API key into the terminal; there is no way in without a Google account.

Example from practice

Windows install and a first task

Roaming Rebel installed Antigravity CLI from PowerShell, signed in with a Google account, pasted the issued key, picked a model with medium effort and asked for a Python file computing a factorial. The agent produced the file and asked permission before writing it to the folder. The /usage screen showed two model groups with shared weekly and 5-hour allowances and 100% remaining. This was an install walkthrough, not a test of code quality.

source: Roaming Rebel, 'Google's FREE AI Coding Agent Has Gemini, Claude & GPT-OSS!'

What reviewers say

Reviewer opinions on their own tasks and hardware, not measurements. Links go to the videos; transcripts live in docs/raw-data.

Who it is for

  • Engineer in a Google Workspace environment outside Russia

Models in this agent

Score is from our manager-task benchmark; models without a score are not measured yet.

Gemini 3.1 Pro 7.33Claude Sonnet 4.6 8.18Claude OpusGPT-OSS 120B

What changed

  • The Antigravity SDK now runs local models offline, starting with Gemma 4 26B via LiteRT →
  • Gemini CLI was shut down and replaced by Antigravity CLI

How to brief an agent like this

The four-line brief is the Foundation module: prompt structure, LLM agents and MCP, an AI policy for the team. It starts with the free open module.

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