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Agents & Orchestration

💬UI-TARS

ACTIVE BREAKOUT

bytedance/UI-TARS-desktop · homepage ↗

The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra

⭐ Very popular: 39k stars, gaining about 131 a week

View on GitHub ↗

repo profile

vintage 2025 1 year old
language TypeScript
license Apache-2.0

momentum

total stars 39k
stars added last week +131
used by 62 repos & packages
commits / week 0 cooling · -100% vs prior mo
issues closed 27% closed same-day, median
contributors 49
release cadence weekly
last activity 11d ago

durability

backing company-owned ByteDance
openness permissive
security score 5.9/10 OpenSSF Scorecard · 2026-02-24
bus factor 2 concentrated
top-author share 36% 6 mo

bus factor = how many people it takes to cover more than half the commits (6 months). 1 is a solo project; higher means the work is spread across a team. top-author share is the single busiest author's slice of those commits.

since we covered it

monthly average + 2k/mo (+85%/mo) · + 36k total since PR#1

why it's a big deal

  • Gives developers an open-source stack for building AI agents that operate real computer interfaces, covering both a native GUI-control desktop app and a general Agent TARS framework.
  • Targets people automating on-screen tasks through vision-based control of mouse and keyboard, with cross-platform support across Windows, macOS, and browser.
  • Ships CLI, Web UI, and headless server modes plus MCP integration, so external tools can be connected without building the agent runtime from scratch.

under the hood

  • Written mostly in TypeScript and organised as a pnpm and Turbo monorepo split into apps, packages, multimodal, and infra directories, with Vitest for tests.
  • Uses Vision-Language Models to drive computer control from screenshots, and offers a hybrid browser agent that can run via GUI Agent, DOM, or a combined strategy.
  • Runs on the UI-TARS-1.5 and 1.6 Seed models and integrates model providers including Volcengine DouBao and Anthropic Claude, with an Event Stream protocol for context handling.

Radar summary, generated from the project's public sources

star history

PR#1 · 2k39k now Jan 2025Aug 2026
  1. PR#1 2k 2025-02-05
  2. now 39k + 36k since first covered

curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.

understory

Better known than its recent output, coasting a little on attention.

-70 understory score output 8 · clout 78
Aug 2025 Jul 2026
  • output, commits & releases
  • clout, star velocity

output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →

covered in

  • PR#1 2025-02-05 below the radar

    Control Your Computer With Natural Language

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