Phi-Ground Tech Report: Advancing Perception in GUI Grounding
With the development of multimodal reasoning models, Computer Use Agents
(CUAs), akin to Jarvis from "Iron Man", are becoming a reality. GUI
grounding is a core component for CUAs to execute actual actions, similar to
mechanical control in robotics, and it directly leads to the success or failure
of the system. It determines actions such as clicking and typing, as well as
related parameters like the coordinates for clicks. Current end-to-end
grounding models still achieve less than 65\% accuracy on challenging
benchmarks like ScreenSpot-pro and UI-Vision, indicating they are far from
being ready for deployment. % , as a single misclick can result in unacceptable
consequences. In this work, we conduct an empirical study on the training of
grounding models, examining details from data collection to model training.
Ultimately, we developed the Phi-Ground model family, which achieves
state-of-the-art performance across all five grounding benchmarks for models
under 10B parameters in agent settings. In the end-to-end model setting, our
model still achieves SOTA results with scores of \textbf{43.2} on
ScreenSpot-pro and \textbf{27.2} on UI-Vision. We believe that the
various details discussed in this paper, along with our successes and failures,
not only clarify the construction of grounding models but also benefit other
perception tasks. Project homepage:
https://zhangmiaosen2000.github.io/Phi-Ground/{https://zhangmiaosen2000.github.io/Phi-Ground/}
688c55378c434640078cc488
Miaosen Zhang
claimed_verified
2025-08-06T19:29:47.283Z
62a30bf72dac39c2173c0a8c
/avatars/15fb1ea3dcc7ccd8bc8002ce282e27b3.svg
Miaosen Zhang
user
Miaosen
688c55378c434640078cc489
Ziqiang Xu
688c55378c434640078cc48a
Jialiang Zhu
688c55378c434640078cc48b
Qi Dai
688c55378c434640078cc48c
Kai Qiu
688c55378c434640078cc48d
Yifan Yang
claimed_verified
2025-08-06T19:29:42.452Z
62d18eb81e36881a57f29bf4
/avatars/104851421b4ee9641daaf15942fa7ea1.svg
Yif Yang
user
Yif29
688c55378c434640078cc48e
Chong Luo
688c55378c434640078cc48f
Tianyi Chen
claimed_verified
2025-08-06T19:29:39.219Z
64ad94f05a4a60156925ec96
/avatars/643bdb076e703bfcc89cec6fccb756c6.svg
Tianyi Chen
user
tianyic
688c55378c434640078cc490
Justin Wagle
688c55378c434640078cc491
Tim Franklin
688c55378c434640078cc492
Baining Guo
Phi-Ground Tech Report: Advancing Perception in GUI Grounding
With the development of multimodal reasoning models, Computer Use Agents
(CUAs), akin to Jarvis from "Iron Man", are becoming a reality. GUI
grounding is a core component for CUAs to execute actual actions, similar to
mechanical control in robotics, and it directly leads to the success or failure
of the system. It determines actions such as clicking and typing, as well as
related parameters like the coordinates for clicks. Current end-to-end
grounding models still achieve less than 65\% accuracy on challenging
benchmarks like ScreenSpot-pro and UI-Vision, indicating they are far from
being ready for deployment. % , as a single misclick can result in unacceptable
consequences. In this work, we conduct an empirical study on the training of
grounding models, examining details from data collection to model training.
Ultimately, we developed the Phi-Ground model family, which achieves
state-of-the-art performance across all five grounding benchmarks for models
under 10B parameters in agent settings. In the end-to-end model setting, our
model still achieves SOTA results with scores of \textbf{43.2} on
ScreenSpot-pro and \textbf{27.2} on UI-Vision. We believe that the
various details discussed in this paper, along with our successes and failures,
not only clarify the construction of grounding models but also benefit other
perception tasks. Project homepage:
https://zhangmiaosen2000.github.io/Phi-Ground/{https://zhangmiaosen2000.github.io/Phi-Ground/}
The Phi-Ground model family achieves state-of-the-art performance in GUI grounding for multimodal reasoning models, improving accuracy across various benchmarks.
multimodal reasoning models Computer Use Agents GUI grounding end-to-end grounding models ScreenSpot-pro UI-Vision Phi-Ground model family