Open Comet

Running the agent brain in your tab: Gemma 4 on WebGPU

Native tool calling, screenshot understanding and live streaming — fully client-side via Transformers.js. How the model hub, checkpoint-resume downloads and the WASM fallback make on-device AI practical, and why cloud and local brains share one code path.

This article is part of the Open Comet blog — research-backed writing about privacy-first browser agents, with citations to peer-reviewed papers, official standards and repository files. The interactive version of this article (syntax-highlighted code, inline figures and a linked citation list) is available in the app.

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