Google's Antigravity 2.0 Builds a Full OS Using 96 Agents in 12 Hours for Under $1K

96 Agents, One OS

Google's Antigravity 2.0 has demonstrated a remarkable milestone: 96 AI agents working in parallel built a functioning operating system from scratch in 12 hours, spending less than $1,000 in token costs. The resulting OS successfully runs Doom, serving as a concrete proof of capability.

What Is Antigravity 2.0?

Antigravity 2.0 is Google's agent-first development platform, unveiled at Google I/O 2026 as the successor to Gemini CLI. Built in Go for speed, it supports asynchronous multi-agent workflows, plugin extensions, and deep integration with Gemini 3.5 Flash. The platform enables agents to delegate tasks, work in parallel, and coordinate across complex, long-horizon engineering goals.

Why This Matters

The OS creation demo represents a significant leap in what AI agent pipelines can accomplish autonomously. While this OS is not production-grade, it proves that a multi-agent system can architect, write, and integrate low-level systems code at a scale previously requiring large engineering teams and years of effort.

The cost efficiency is equally striking. At under $1K for a 12-hour OS build, Antigravity 2.0 positions agentic AI as a genuinely viable tool for large-scale software engineering tasks — not just code completion or debugging.

Community Reaction

The post on r/singularity received over 1,700 upvotes, reflecting intense community interest. For many observers, this demo exemplifies the accelerating trajectory of AI-assisted development and raises fresh questions about the timeline for fully autonomous software engineering.