UI-TARS
ByteDance Seed / Volcano EngineUI-TARS is ByteDance Seed's GUI agent model, which takes screenshots as its only input and returns mouse, keyboard and touch actions for desktop, browser and phone interfaces. The released checkpoints are the 2B, 7B and 72B SFT and DPO models and UI-TARS-1.5-7B, built on a Qwen2.5-VL base. The UI-TARS-desktop application that drives it is a separate project.
The strongest UI-TARS-1.5 model and UI-TARS-2 are not downloadable; UI-TARS-1.5 is offered to researchers on request, and the scores here are read from the released 7B.
Openness
3 high confidence- weights
- open(safetensors on the Hub, ungated)
- data
- described(the paper and README describe large-scale GUI screenshots and action traces
- code
- partial(action parser, prompt templates and inference tests
- license
- Apache-2.0(OSI
The released checkpoints are Apache 2.0 and the repository carries the prompt templates and action parser needed to run them. The GUI trajectory data and the training pipeline are not published.
- https://cdn.jsdelivr.net/gh/bytedance/UI-TARS@main/LICENSE recorded 2026-09-26
The repository LICENSE is the Apache License, Version 2.0
- https://cdn.jsdelivr.net/gh/bytedance/UI-TARS@main/README_v1.md recorded 2026-09-26
"Combines large-scale annotated and synthetic datasets"; no dataset linked
- https://data.jsdelivr.com/v1/packages/gh/bytedance/UI-TARS@main?structure=flat recorded 2026-09-26
Repository file list: codes/ui_tars action_parser.py and prompt.py, inference tests, one data/training_example.json; no trainer or training config
- https://huggingface.co/api/models?author=ByteDance-Seed&search=UI-TARS&limit=100 recorded 2026-09-26
All six ByteDance-Seed UI-TARS checkpoints are tagged license:apache-2.0
- https://huggingface.co/api/models/ByteDance-Seed/UI-TARS-1.5-7B?expand[]=downloads&expand[]=cardData&expand[]=gated&expand[]=createdAt&expand[]=lastModified&expand[]=siblings recorded 2026-09-26
Hub metadata for UI-TARS-1.5-7B: gated false, seven safetensors shards, card license apache-2.0
Adoption
3 high confidenceHugging Face downloads over the trailing 30 days, summed across ByteDance Seed's six UI-TARS checkpoints; nearly all of it is UI-TARS-1.5-7B. Use through the UI-TARS-desktop application is counted only where it downloads these weights.
- https://huggingface.co/api/models?author=ByteDance-Seed&search=UI-TARS&limit=100 recorded 2026-09-26
Six UI-TARS checkpoints with 605,451 downloads in the trailing 30 days, 598,585 of them UI-TARS-1.5-7B
Capability
4 high confidenceUI-TARS acts on what it sees, turning screenshots into clicks, keystrokes and phone gestures across desktop, web and Android. It sits a step below Qwen-Omni because it understands only images, with no audio or video input.
- https://arxiv.org/abs/2501.12326 recorded 2026-09-27
"a native GUI agent model that solely perceives the screenshots as input and performs human-like interactions (e.g., keyboard and mouse operations)"
- https://huggingface.co/ByteDance-Seed/UI-TARS-1.5-7B/raw/main/README.md recorded 2026-09-27
Model Scale Comparison: UI-TARS-1.5-7B OSWorld 27.5, ScreenSpotPro 49.6; UI-TARS-1.5 42.5 and 61.6; "We are providing early research access to our top-performing UI-TARS-1.5 model"
Verified 2026-09-26