Google adds dynamic model switching to Antigravity

Gemini 4 Hydrogen and Orchestrator | Google Antigravity Blog

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Published Thursday, November 12, 2026 · 3:07 PM EST

Google is rolling out Orchestrator in Antigravity for AI Ultra subscribers, letting a coding session switch between Gemini 4 Carbon and Hydrogen as work progresses. Enterprises can access it through Gemini for business. Google describes Carbon planning and investigating tasks before Hydrogen edits code and runs tests, with work handed back when Hydrogen encounters difficulties. The company says Orchestrator achieved near-Carbon task success on Terminal-Bench 4.1 while consuming 24% less quota and finishing 19% faster on average. Hydrogen is also rolling out as a standalone option to paid AI Pro and Ultra subscribers. Orchestrator's consumer rollout is limited to Ultra.

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