# Online Dense Reinforcement Learning with Planning-Grounding Agent for UI Navigation on Live IOS Apps

> Source: <https://aiflash.com/news/142268/>
> Published: 2026-10-30 06:30:11+00:00

While frontier vision-language models demonstrate strong capabilities in user interface (UI) navigation, their high inference costs prohibit everyday use. Conversely, smaller models trained via supervised fine-tuning (SFT) or offline reinforcement learning often memorize static trajectories, leading