Deepsider Free Gemini: Antigravity Extension, Direct Gemini API in Browser

Google Antigravity (formerly known as Deepsider) is Google’s agentic development platform, free for all developers.

It’s not a simple browser extension — it’s a complete AI development environment supporting multi-agent parallel execution, project management, and automated tasks.

What is Google Antigravity

Antigravity is Google’s next-gen agentic development platform. It lets you use Gemini Pro’s API directly in your browser, no configuration, no API Key needed.

Core features:

• Multi-agent parallel — Run multiple AI Agents simultaneously, grouped management
• Project management — Organize conversations into Projects, operate across workspaces
• Scheduled tasks — Automate routine tasks
• CLI tool — Lightweight terminal interface for autonomous coding Agents
• SDK — Python scripts for rapid prototyping

Free Policy

Completely free — Antigravity is currently free for all users, no paid plans.

Gemini Pro API is free through the Antigravity environment, no additional API Key or subscription needed.

How to Use

Browser:

1. Visit antigravity.google
2. Log in with Google account
3. Start using

CLI Tool:

# Install Antigravity CLI
# Then run autonomous agents directly
antigravity run "build a todo app"

SDK:

from antigravity import Agent

agent = Agent(model="gemini-pro")
result = agent.run("analyze this codebase")

Supported Models

• Gemini Pro — Free through Antigravity
• Gemini 3.1 Pro — Latest model version
• Other Google models via SDK

vs Gemini CLI

Gemini CLI was Google’s official terminal AI coding tool, but as of June 18, 2026, Google stopped free-tier Gemini CLI service.

Antigravity fills this gap — it provides similar Agent functionality, but completely free, with richer features (multi-agent parallel, project management, scheduled tasks).

Who Should Use This

• Wanting free Gemini API access — No API Key, browser-only
• Needing multi-agent parallel work — Antigravity’s core advantage
• Terminal lovers — CLI supports autonomous coding and Shell commands
• Prototyping — SDK for rapid Agent app development

Summary

In one sentence: Google Antigravity is a free agentic development platform, use Gemini Pro API directly in browser, supports multi-agent parallel, CLI tools, SDK development.

Currently completely free, no paid plans. If you need a free, powerful AI development environment, this is the top choice.

Project: antigravity.google

Data current as of July 14, 2026. Free policies may change.