Independent register of AI agents & harnesses · no sponsored placementsEdition 2026-09 · 107 entries · evidence to 26 Sept 2026

The Register / Browser & computer use / UI-TARS Desktop

Register entry · Browser & computer use · updated 26 Sept 2026

UI-TARS Desktop

UI-TARS-desktop (also known as Agent TARS) is ByteDance's Apache-2.0 open-source multimodal desktop agent stack that enables autonomous control of web browsers and operating systems. Built on ByteDance's vision-language models (UI-TARS 2B, 7B, 72B), it perceives raw screenshots directly to plan and execute mouse and keyboard actions without requiring DOM trees or accessibility labels. It can be run fully locally with self-hosted models or connected to cloud model endpoints.

Unverified description.The description, features and status on this entry come from a research batch that failed our source checks and have not been re-verified. Its pricing and dated changes are withheld; check the maker’s site.

What reviewers and users praise

  • Not enough evidence yet.

What they criticise

  • Not enough evidence yet.
Rating certificate · AW/26-09/90326 Sept 2026

UI-TARS Desktop

ByteDance · Browser & computer use

Open source
Adoption55
Experts—
Crowd—
Experts vs the crowdneeds both scores
Experts—
Crowd—
PriceSee the maker's site
Use it viaDesktop app, CLI, API
Runs onmacos, windows, linux
LicenceApache-2.0
UpdatedEvidence collected 26 Sept 2026

How the rating was worked out

Weights for Browser & computer use: adoption 35%, experts 40%, crowd 25%. Fewer than two pillars have enough evidence. The method.

Adoption & momentumweight 35%55GitHub stars 39k → 79 · 0 releases in 90 days → 0
reach × 0.7 + momentum × 0.3
Expertsindependent reviews · weight 40%—Only 1 independent review (3 needed)
Crowdcommunity sample · weight 25%—Only 3 community items sampled (6 needed)
Rating—Not rated: fewer than two pillars have enough evidence.

Evidence checks. Part of this entry came from a research batch that failed verification: only items confirmed at their source are used, and its trust grades and pros and cons are withheld. 4 items removed: could not be verified at the source (4). How evidence is checked.

Trust & safety

Seven dimensions graded A–D from documented facts. Overall: not enough data.

n/e

Permission model

Not established.

n/e

Data access scope

Not established.

n/e

Data storage

Not established.

n/e

Data retention & training

Not established.

n/e

Incident history (24 months)

Not established.

n/e

Compliance

Not established.

n/e

Transparency

Not established.

The experts

1 named independent reviews found; dated reviews from the last 12 months are scored.

  • positive
    Stagehand and Browser Use are strong browser-first starting points; CUA, Agent S3, and UI-TARS target broader computer controlAlyona Vert. (Turing Post) · 2 Aug 2026 · turingpost.com

The crowd

3 coded posts from hackernews.

2 positive1 mixed0 negative
  • positive
    I've had lots of success with generating coordinates and answering questions using the UI-TARS modelVision agents thread · 5 May 2026 · news.ycombinator.com
  • positive
    I’d also checkout midscene, you can set the model and UI-TARS works but you can also use qwen vision models and it works.Vision agents thread · 6 May 2026 · news.ycombinator.com
  • mixed
    Looking at the table, I will admit that I don't get most of the use cases ( maybe with exception of comparison shoppingComputer use discussion · 27 Nov 2025 · news.ycombinator.com

Ranked alongside

Other ranked entries in Browser & computer use.

Compare with the top two
Browser UseBrowser Use (browser-use.com)66
StagehandBrowserbase65

Sources

Every figure above traces to one of these, observed up to 26 Sept 2026.

  1. GitHub: bytedance/UI-TARS-desktop
  2. arXiv: UI-TARS: Pioneering Automated GUI Interaction with Native Multimodal Agents
  3. Agent TARS Official Site