Google has announced the rollout of Gemini 4 Hydrogen within Google Antigravity, alongside a new model dropdown option called Orchestrator. Orchestrator pairs Hydrogen with Gemini 4 Carbon to achieve an optimized balance of quality, efficiency, and latency. This update follows the introduction of Gemini 4 Carbon, which has already seen significant adoption with tens of thousands of swarms launched on Antigravity, and aims to provide a more suitable solution for everyday feature work and debugging, reducing slowdowns and improving overall performance.