Antigravity CLI, Google’s new command-line tool for agent-first development, has been launched at Google I/O 2026. Built in Go, it offers a snappier terminal experience and integrates with Gemini 3.5 Flash for asynchronous multi-agent workflows.
The tool replaces Gemini CLI, which had accumulated over 100,000 GitHub stars and 6,000 merged pull requests. Google said user needs had shifted from single-agent terminals to multi-agent systems that share a unified backend.
“Gemini CLI proved the terminal could be an incredible interface for agentic tasks, but user needs shifted—they now require multiple agents communicating with each other to split up the work and solve complex problems.”
Google Developers Blog
Key Features of Antigravity CLI
Antigravity CLI retains critical features from Gemini CLI, including Agent Skills, Hooks, Subagents, and Extensions (now as plugins). It enables asynchronous workflows that orchestrate multiple agents for complex tasks in the background without locking the terminal session.
The tool shares the same agent harness as Antigravity 2.0 and the new Antigravity desktop app. This ensures all future improvements to core agents apply automatically across platforms.
Gemini 3.5 Flash Integration
Gemini 3.5 Flash, which powers Antigravity CLI, combines frontier intelligence with high speed. Google says it outperforms Gemini 3.1 Pro on most benchmarks while running four times faster than other frontier models.
Managed agents are also available via the Interactions API and in Google AI Studio. Developers can spin up an agent with a single API call that reasons, uses tools, and executes code in an isolated Linux environment.
Migration and Enterprise Support
On June 18, 2026, new installations of Gemini CLI on GitHub organizations will stop. However, organizations using Gemini CLI via Gemini Code Assister Standard or Enterprise licenses retain access. Gemini CLI will remain accessible through paid Gemini and Gemini Enterprise Agent Platform API keys.
Google also introduced a new $100 per month AI Ultra plan with a 5X higher usage limit in Antigravity. For a limited time, new and existing subscribers receive $100 in bonus credits if they hit their quota limit. The offer expires May 25, 2026.
Ecosystem and Future Outlook
Antigravity CLI is part of the larger Antigravity 2.0 ecosystem, which includes a desktop app and SDK. The platform is designed for agent-first development, where AI acts as an autonomous actor capable of planning, executing, and iterating on complex tasks.
The developer community has shown strong interest; Gemini CLI had millions of users and weekly releases. Antigravity CLI addresses their need for multi-agent workflows that scale from terminal to full application.
Source: X (@JackWoth98) — researched
