Google just dropped Antigravity on Nov 18, 2025, their new AI agent-first IDE that's like having a senior engineer as your co-pilot. I'm Samuel Adekunle, your Senior Flutter guy, and in this article, I will guide you through how best to install and configure Google Antigravity for use. We will also explore key concepts of Antigravity, such as Agent Manager, Editor, and Browser, and use my website as a use case with Antigravity.
Alright, quick backstory: Antigravity launched alongside Gemini 3, Google's beast-mode AI model for reasoning and multi-modal tasks. It's free in public preview right now, and download is available for Mac, Windows, or Linux. No cost, generous rate limits on Gemini 3 Pro (resets every 5 hours), and it plays nice with Claude Sonnet 4.5 or even OpenAI's GPT-OSS.
Why the hype? It's 'agentic' - meaning AI agents handle tasks autonomously, like debugging a web app or generating UI from sketches. It's not just code completion; it's task delegation.
Quick features rundown - tailored for us Flutter folks:
- Agent Interface: Delegate tasks via natural language in the editor, terminal, or browser preview. How-to: Type '/agent [task]' - e.g., '/agent Fix this Flutter responsive grid for iOS Safari.'
- Multi-Model Support: Swap Gemini 3 for Claude if you need creative UI gen. How-to: Settings > Models > Select. Rate limits? Chill for solos.
- Proof-of-Work Tracing: Every change logs why the agent did it - audit trail for team collabs. Huge for architecture reviews.
- Async Feedback Loop: Agents iterate based on your 'nah, make it more vibe-y' inputs. How-to: Hit 'Refine' and describe.
- Cross-Platform Magic: Runs local, no cloud lock-in. Integrates with VS Code extensions if you hybrid.
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