Google I/O 2026: Antigravity 2.0 arrives — and Gemini CLI is deprecated

Antigravity 2.0 rebuilds around orchestration (subagent workflows, scheduled background tasks, an SDK, Managed Agents in the Gemini API) and a Go-based Antigravity CLI ships for everyone. The same day, Google announces Gemini CLI will stop serving free and AI-plan requests on June 18 — the year-old free lunch gets an end date.

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