Google Antigravity

Canonical version: Google Antigravity.

Google Antigravity is Google's agentic development platform, given its first major platform release at Google I/O 2026 (19 May 2026). It is built around a single agent harness exposed through four surfaces:

• Antigravity 2.0 — the agent-first desktop application
• Antigravity CLI — the terminal interface, rebuilt in Go (successor to Gemini CLI)
• Antigravity SDK — programmatic access to the harness, for building custom agents
• Antigravity IDE — the agentic IDE; the original Antigravity, from December 2025

Because all four share the same harness, improvements to agent behaviour land across every surface at once.

Why Google built it

Google is unifying tooling that grew separately — Gemini CLI, the Antigravity IDE, Code Assist integrations — onto one platform. Its stated reasoning: the single-agent workflows of "the early days of 2025" no longer match how developers work; complex problems now want multiple agents splitting the job over a consistent backend.

The Gemini CLI consolidation

Antigravity CLI replaces Gemini CLI. Per the 19 May 2026 announcement, consumer users (Google AI Pro / Ultra, free Gemini Code Assist for individuals) get roughly 30 days to migrate, and Gemini CLI stops serving them on 18 June 2026. Enterprise Code Assist licences and API-key users keep Gemini CLI indefinitely. AI Agent Skills, Hooks, Subagents, and Extensions carry over — Extensions rebranded as "Antigravity plugins."

Why it matters

• The platform, not the model, is the moat: one harness behind CLI, IDE, SDK, and desktop is harder to match than any single tool
• It mirrors how Anthropic (Claude Code everywhere) and OpenAI (OpenAI Codex) are consolidating — the agent harness is becoming the unit of competition

References

• Introducing Google Antigravity: https://antigravity.google/blog/introducing-google-antigravity
• Gemini CLI to Antigravity CLI transition: https://developers.googleblog.com/en/an-important-update-transitioning-gemini-cli-to-antigravity-cli/

Related

• Google
• Antigravity 2.0
• Antigravity CLI
• Antigravity SDK
• Antigravity IDE
• Gemini CLI
• Gemini Code Assist
• Gemini Spark
• AI Agent Harness
• AI Agent Skills
• AI Agents
• Claude Code
• OpenAI Codex
• Gemini

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