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On-Device iPhone Assistant Router

Jav is an on-device iPhone assistant that uses Laya, an open-weight alternative to Jev, with CoreAI to route requests to actions such as timers, reminders, calendar events, music, and weather.

View on X timearound 100 ms
sami@sa_mous𝕏
Apple pays Google $1 billion a year for Siri. I rebuilt it over the weekend with Jev. Meet Jav, an assistant that makes decisions faster thanks to Laya, the open-weight alternative to Jev, running entirely on-device with CoreAI. I fine-tuned it on 10,000 intent samples covering around 100 different actions an iPhone assistant might need to take. It takes a request and decides what should happen: timer, reminder, calendar event, music, weather... Laya makes the routing decision in around 100 ms. Surprisingly, the bottleneck comes from Apple's own Foundation Model and App Intents APIs. Dec
Sep 24, 2026X postsView on X
The author fine-tuned it on 10,000 intent samples spanning around 100 actions. The author says Apple’s Foundation Model and App Intents APIs are the bottleneck.

Also filed under Triage & routing