Google Antigravity

Google Antigravity is an agent-first development platform with an editor view and a manager surface where you spawn and watch multiple agents work across a codebase, powered by Gemini plus Claude and other models. It is free in public preview with a personal Google account, which makes it easy to try the multi-agent workflow. The tradeoff is that it is new and still in preview, so expect rough edges and shifting features, and the pricing once it leaves preview is not yet known.