If you're using Gemini CLI, it will be completely unusable after June 18.
Google announced at I/O 2026 that Gemini CLI and Antigravity are being unified into one product: Antigravity CLI. This isn't a simple rename — it's an architecture-level restructuring.
Timeline
Today (May 19): Antigravity CLI is officially available to everyone.
June 18: Gemini CLI and Gemini Code Assist IDE extensions stop serving Google AI Pro/Ultra users and free users.
Enterprise users: Access remains unchanged via Gemini Code Assist Standard or Enterprise licenses.
Personal users have less than a month to migrate.
Core Changes
Google said a key phrase in the blog post: "Your terminal tools need to share a unified backend with the rest of your workflow."
Translation: the era of single-agent running in the terminal is over. The current need is multiple agents working simultaneously, communicating with each other — requiring a unified server-side orchestration layer.
Antigravity CLI changes:
- Rewritten in Go (from Node.js): Significantly improved startup speed and response latency
- Async workflows: Multiple agents can run in the background simultaneously without locking the terminal
- Unified architecture: CLI and Antigravity desktop app share the same agent orchestration engine
- Core features preserved: Agent Skills, Hooks, Subagents, Extensions all migrated
Migration Advice
Don't wait until June 17. Install Antigravity CLI now and test your most common workflows. Google will release video walkthroughs in the coming weeks, but the documentation is available now.
Main sources: