Google leaks COSMO assistant
- Google briefly published an unreleased Android app called COSMO on the Play Store on May 1, then pulled it within hours after reports surfaced. - The listing pointed to a hybrid assistant with Gemini Nano on-device, server AI backup, and 14 “Skills,” including Deep Research and Mariner. - It matters because Google Assistant’s phaseout is already underway, and COSMO looks like a more proactive Gemini-era replacement.
Google seems to have shown its hand a little early. On May 1, the company briefly put an unreleased Android app called COSMO on the Play Store, then removed it after people noticed. The app looked rough, which is usually a tell — this was probably not meant for public eyes yet. But the listing still revealed something important: Google is experimenting with an assistant that mixes on-device AI with cloud help, and it looks more ambitious than today’s Gemini app. ### What is COSMO supposed to be? COSMO was described as an “experimental AI assistant application for Android devices,” and the package name tied it to Google Research rather than a finished consumer product. That matters because it makes COSMO look less like a routine app launch and more like a live prototype — something Google is testing as it figures out what comes after the old Assistant. ### Why is the on-device part a big deal? Most AI assistants still lean heavily on the cloud. COSMO’s listing said it brings AI “directly onto your device,” and reports tied it to Gemini Nano running locally, with server-side AI also available when needed. Basically, Google seems to be chasing a hybrid model: fast private tasks on the phone, heavier reasoning across Android through AICore and Gemini Nano. ### What did the leak actually show? The most interesting part was the feature list. COSMO reportedly exposed 14 AI “Skills,” including Deep Research, a browser agent powered by Mariner, and tools like a Calendar Event Suggester. That points to a much more proactive assistant — not just answering prompts, but helping plan, browse, summarize, and take actions on Android. ### Why does Mariner matter here? Mariner is the clue that COSMO may be about action, not just conversation. A browser agent can navigate pages and complete steps for you, which is a very different promise from the Gemini to do chores, not just talk. ### Is this replacing Google Assistant? Maybe not by name, but that sure looks like the direction. Google has already been winding down Assistant and shifting users toward Gemini, with reporting late last year pointed. ### Why leak it now? The timing is hard to ignore. Multiple reports framed COSMO as a likely preview of what Google may want to talk about around I/O, and the accidental-looking Play Store publish happened just weeks before the event. I’m inferring a bit here, but this feels like Google testing packaging and plumbing for a next-wave assistant rather than shipping a finished app to users. ### So what’s the real takeaway? The leak matters less because COSMO exists and more because of what it reveals. Google appears to be building an assistant that lives closer to the device
