UI-TARS
ByteDance's screenshot-driven GUI agent model, plus a desktop app and CLI to run it
Overview
UI-TARS is ByteDance Seed's family of GUI-agent models that turn a screenshot into mouse and keyboard actions. The Apache-2.0 UI-TARS-desktop repository ships UI-TARS Desktop for Windows and macOS and Agent TARS, a CLI and web UI that adds DOM browser control and MCP tools. Weights up to UI-TARS-1.5-7B are open; UI-TARS-2's are not.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 12 Oct 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
What you can produce with UI-TARS
- Vision-language GUI agent model: screenshot in, mouse and keyboard actions out
- Agent TARS CLI and web UI combining vision, DOM browser control and MCP tools
- UI-TARS Desktop app for local computer control on Windows and macOS
- MCP server integration for real-world tools
- Prompt templates for desktop, Android and grounding-only tasks
- Apache-2.0 open weights up to UI-TARS-1.5-7B
UI-TARS is one of the few computer-use models you can download, with UI-TARS-1.5-7B and earlier weights under Apache-2.0, and ByteDance's papers put it ahead of 2024-era GPT-4o and Claude agents, especially on mobile. The newer UI-TARS-2 has no public weights.
Agent TARS is active and got a security-focused release in October 2026, but the desktop app has not shipped since August 2025. It is free, capable and thinly documented, and safety is your job: good for researchers and tinkerers, not yet a production agent.
What we found
UI-TARS is a family of GUI-agent models from ByteDance's Seed team, and the name now also covers the tooling built around them. The model takes a screenshot as its only input and outputs mouse and keyboard actions, with no DOM or accessibility-tree access. The UI-TARS-desktop repository, under Apache-2.0, packages two projects: UI-TARS Desktop, a Windows and macOS app that drives your own computer, and Agent TARS, a CLI and web interface that combines vision with DOM-based browser control and MCP tools.
The research case comes from ByteDance's own papers. The January 2025 report put UI-TARS-72B at 82.8 on VisualWebBench, ahead of GPT-4o at 78.5, and at 24.6 on OSWorld against 22.0 for Claude's computer use at a 50-step budget, leading at 15 steps too. It also noted that Claude struggled with mobile tasks, where UI-TARS did well. UI-TARS-2, described in September 2025, reports 47.5 on OSWorld and 73.3 on AndroidWorld. All of these are vendor-run comparisons against competitors as they stood at the time.
Open weights are the important detail. ByteDance has published UI-TARS 2B, 7B and 72B and UI-TARS-1.5-7B on Hugging Face under Apache-2.0. UI-TARS-2 has a technical report but no public weights, so the headline model is not one you can download.
The software side is uneven. Agent TARS is active: version 0.3.1, released on 8 October 2026, bound its server to localhost by default and added access tokens, CSRF protection and host checks. The desktop app has not shipped a new build since August 2025, a release that also retired its free remote computer and browser operators, and the Agent TARS website was serving a mismatched security certificate when we checked.
Everything here is free, but you supply the compute, whether self-hosted weights or a paid model endpoint. It is a strong research platform and a capable tinkerer's tool, not yet a supported product.
Compiled by RECATOOLS from public sources: vendor documentation and pricing, code repositories and published reporting.
About this listing
This entry was compiled from publicly available data including UI-TARS's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with UI-TARS unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
For the latest details, please refer to UI-TARS directly →
Spotted something out of date? Suggest an update →
Related reading
Alternatives to UI-TARS
More in Agents & Automation
