Overview
- Google published Cosmo on the Play Store as an experimental Android assistant that downloads about 1.13 GB because it bundles a local Gemini Nano model.
- The app presents a basic chat interface and asks for broad system permissions, underscoring that it is a research build rather than a consumer product.
- Settings expose a Fulfillment Model choice with Hybrid, PI Only, and Nano Only modes, which reporters describe as switching between server and on-device processing.
- A list of proactive Skills includes Document Writer, Calendar Event Suggester, Quick Photo Lookup, Conversation Summary, and a Browser Agent called Mariner.
- Reporters cast the release as a test ground that could preview features for Gemini or Android, with Google I/O 2026 viewed as the likely moment for official details.