Antigravity

Antigravity started as a Cursor competitor when Google launched it in November 2025 alongside Gemini 3. At Google I/O 2026, it became something bigger: a standalone desktop app, a terminal CLI (built in Go for speed), an SDK for custom agents, and a managed cloud execution layer, all sharing the same underlying agent harness. The idea is that developers can coordinate fleets of subagents working in parallel rather than prompting a single model one step at a time.

The Antigravity CLI fully replaces Gemini CLI, which Google retired for consumer users in June 2026. The CLI shares authentication, skills, and context with the desktop app, so you can switch surfaces mid-task without losing state. The SDK gives engineering teams programmatic access to the same harness Google uses internally, making it possible to embed Antigravity-style agent behavior inside your own products.

In the agentic coding market, Antigravity competes directly with Cursor, Claude Code, Kiro, and OpenAI Codex. Its core bet is that whoever owns the orchestration layer underneath parallel agents wins developer loyalty long-term. Google set the default model as Gemini 3.5 Flash, which it claims runs four times faster than other frontier models, making the speed advantage compound when many agents are running at once.