Google Antigravity is Google's agent-first development platform — IDE, CLI, and server-side harness in one. Antigravity 2.0, launched at Google I/O 2026 (May 19), added Antigravity CLI as the terminal-agent successor to Gemini CLI, and upgraded the default model to Gemini 3.5 Flash. It reframes the developer's role from code writer to "mission controller" — you issue directives, the platform's agents plan, execute, and verify across files, terminal, and browser simultaneously.
Why It's in Trial
Antigravity 2.0 launched as a publicly available platform at Google I/O 2026, resolving the "Public Preview, not GA" blocker from prior sessions. The primary upgrade: Gemini CLI (open-source, 100k+ GitHub stars) is being sunset in favour of Antigravity CLI — a closed-source terminal agent backed by Gemini 3.5 Flash. This consolidation signals Google's commitment to the platform as the primary developer agent offering.
Trial rather than Adopt because:
- No named production deployments at scale — available broadly but no published case studies with production metrics
- Closed-source shift — the transition from open-source Gemini CLI to closed-source Antigravity CLI removes community extensibility as a trust signal; fork risk is gone, but so is community governance
- Early consolidation — Google is still integrating Jules, Firebase Studio, and Stitch under the Antigravity umbrella; the integration story is not yet complete
What's compelling: SWE-bench Verified of 76.2% from January 2026 benchmarks (based on the initial Antigravity release; independent 2.0 benchmarks pending); Gemini 3.5 Flash backbone with 1M token context; the only platform that inherits Gemini CLI's Agent Skills and Hooks ecosystem while adding desktop and server-side harness.
Antigravity 2.0: Three Interfaces
Desktop App (Agent Manager / Editor View) — the flagship IDE experience. Editor View gives tab completions and inline commands for synchronous file editing. Agent Manager (Manager View) is a task-oriented interface where you issue high-level directives and the IDE dispatches one or more agents to execute them. Agents generate Artifacts (task plans, implementation summaries, browser recordings) so you can verify the agent's reasoning without reviewing every diff. You can comment on an Artifact like a document and the agent incorporates feedback without halting.
Antigravity CLI — the terminal agent successor to Gemini CLI. Maintains Gemini CLI's core features: Agent Skills, Hooks, Subagents, and Extensions (now Antigravity plugins). Backed by Gemini 3.5 Flash. Not open-source — unlike Gemini CLI (Apache 2.0), Antigravity CLI is proprietary. The free tier scope has not been confirmed at the same 1,000 req/day rate as Gemini CLI; verify current limits at signup. Source: TechTimes.
Server-side Harness (Antigravity SDK) — a backend agent runtime for building and deploying agents programmatically. Integrated with Google Cloud Agent Platform for enterprise deployments.
Multi-Agent Parallelism
The Manager View supports dispatching multiple agents simultaneously — e.g., five agents on five different bugs — each with its own context and execution thread. This is the primary differentiator over single-agent tools like Claude Code CLI or standard Cursor.
Security Model
Antigravity enforces safety via a Terminal Command Auto Execution policy chosen at setup, plus per-project Allow/Deny lists for shell commands. This is application-layer enforcement, similar in approach to Claude Code's permission model (rather than OS kernel-level sandboxing like Codex CLI).
Key Characteristics
| Property | Value |
|---|---|
| Interface | Desktop app (Editor + Agent Manager), CLI, SDK |
| Release | v2.0 GA — May 19, 2026 (Google I/O 2026); originally January 2026 |
| Developer | |
| Primary model | Gemini 3.5 Flash (1M token context) |
| Also supports | Claude Opus 4.6, Claude Sonnet 4.6, GPT-OSS-120B |
| SWE-bench Verified | 76.2% (January 2026 benchmark; 2.0 independent benchmarks pending) |
| Pricing | Available for individual developers and enterprise (Google Cloud Agent Platform) |
| License | Proprietary (closed-source; Antigravity CLI is NOT open-source unlike Gemini CLI) |
| Platforms | macOS, Windows, Linux |
| Website | antigravity-ide.com |