Antigravity CLI vs Gemini CLI

Understand the differences between Antigravity CLI and Gemini CLI. Migration guide, feature comparison, and what developers need to know about Google's transition.

Antigravity CLI is Google's successor to Gemini CLI, announced at I/O 2026 and replacing the original tool for individual users on June 18, 2026. While the core agent capabilities remain, the architecture and ecosystem have significantly evolved.

Architecture: Gemini CLI was built in TypeScript/Node.js as an open-source project. Antigravity CLI is built in Go for improved performance and is closed-source. The binary is invoked with 'agy' instead of 'gemini'.

Skills compatibility: Both support the SKILL.md open standard. Skills created for Gemini CLI work in Antigravity CLI by moving them from .gemini/skills/ to .antigravity/skills/. Hooks and subagents are also preserved.

Extensions to Plugins: Gemini CLI Extensions are now Antigravity Plugins with a similar but not identical API. Most extensions can be migrated with minimal changes.

Key improvements: Antigravity CLI adds multi-agent orchestration, enhanced enterprise security controls, and deeper Google Cloud integration. Performance is significantly better due to the Go rewrite.

Migration: The transition requires updating CI/CD pipelines, shell scripts, and IDE integrations that reference the 'gemini' command. Google provides a migration tool to automate most of this process.