Let the expensive model plan and the fast one type: Antigravity's new Orchestrator uses 24% less quota for near-Carbon results
Google added Orchestrator to the model picker in Antigravity, its agent coding app, on November 12, 2026. Instead of running a whole task on one model, Orchestrator lets Gemini 4 Carbon explore the code and write the plan, hands the edits, package updates and test runs to the faster Gemini 4 Hydrogen, and brings Carbon back in to repair the plan if Hydrogen gets stuck. Google says that on Terminal-Bench it reached close to Carbon's own success rate while using 24% less quota and finishing 19% faster on average.
Why it matters
Most of an agent run is routine typing and testing, so paying frontier-model rates for every step burns your limits. This splits the work the way a senior and junior engineer would.
Who it's for
Google AI Ultra subscribers who run long coding tasks in Antigravity and keep hitting their quota.
How to try it
- Update Google Antigravity and open the model selector.
- Choose Orchestrator instead of Carbon for a multi-step task like a refactor or a failing test suite.
- Watch the plan Carbon writes first and correct it before Hydrogen starts editing.
- Compare quota used against a Carbon-only run of a similar task before switching your default.
Plan & availability: Orchestrator is rolling out to Google AI Ultra subscribers from November 12, 2026, and to enterprises through Gemini for business; Google says more models and plans will follow. Hydrogen on its own is in Antigravity for paid Google AI Pro and Ultra. Checked on the Antigravity blog on November 12, 2026.
Source: Google Antigravity on antigravity.google
Written by AgentStackList from the original post. Checked Nov 12, 2026. Features, plans and availability can change, so confirm on the source before you rely on it.
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