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UI-TARS

ByteDanceOpen WeightsPending Human Review

UI-TARS is ByteDance’s native vision-language model family for computer interaction. It reads screenshots, reasons in language, and generates grounded actions, integrating perception, planning, and memory in the model rather than relying on a fixed workflow. The initial paper was published on January 21, with Apache-licensed 2B, 7B, and 72B checkpoints in supervised and preference-trained variants. These routine sizes are grouped on one family page. Downloadable weights support local experimentation with browser, desktop, and mobile agents; the desktop application and execution harness are separate components that carry out the model’s proposed actions.

2025-01-21
2B, 7B, and 72B
Vision-language Transformer
Apache-2.0

Specifications

Parameters
2B, 7B, and 72B
Architecture
Vision-language Transformer
License
Apache-2.0
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
UI-TARS
API Access
Not Available
Chat Interface
Not Available
Variants
UI-TARS-2B-SFTUI-TARS-7B-SFTUI-TARS-7B-DPOUI-TARS-72B-SFTUI-TARS-72B-DPO

Capabilities & Limitations

Capabilities
GUI reasoningvisual groundinglanguage reasoningcomputer use
Known Limitations
Requires an external harness to execute actionsAmbiguous or unfamiliar interfaces can cause incorrect actionsTask completion depends on environment, prompts, and recovery handling
Notable Use Cases
desktop automation researchbrowser task agentsmobile interface interaction
Tool Use Support
Yes

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