Benchmark Almanac

Windows Agent Arena

UI-TARS-2 50.6% leads since September 2025
Dropped

Agents complete more than 150 tasks in a real Windows OS with its apps, tools and browsers. Scripts adapted from OSWorld check the final state.

A harder difficulty mode, where agents also set up tasks, was added on November 10th, 2024. Runs parallelize on Azure in about 20 minutes.

Made by
Microsoft
Released
September 2024
Kind
Desktop apps
Level
Everyday
Scored
Checked automatically
Answers
Agent task
Tasks
All public
Last in a launch post
September 2025, dropped before it saturated
Last model added
November 2025

In the authors’ words

Large language models (LLMs) show remarkable potential to act as computer agents, enhancing human productivity and software accessibility in multi-modal tasks that require planning and reasoning. However, measuring agent performance in realistic environments remains a challenge since: (i) most benchmarks are limited to specific modalities or domains (e.g. text-only, web navigation, Q&A, coding) and (ii) full benchmark evaluations are slow (on order of magnitude of days) given the multi-step sequential nature of tasks. To address these challenges, we introduce the Windows Agent Arena: a reproducible, general environment focusing exclusively on the Windows operating system (OS) where agents can operate freely within a real Windows OS and use the same wide range of applications, tools, and web browsers available to human users when solving tasks. We adapt the OSWorld framework (Xie et al., 2024) to create 150+ diverse Windows tasks across representative domains that require agent abilities in planning, screen understanding, and tool usage. Our benchmark is scalable and can be seamlessly parallelized in Azure for a full benchmark evaluation in as little as 20 minutes. To demonstrate Windows Agent Arena's capabilities, we also introduce a new multi-modal agent, Navi. Our agent achieves a success rate of 19.5% in the Windows domain, compared to 74.5% performance of an unassisted human. Navi also demonstrates strong performance on another popular web-based benchmark, Mind2Web. We offer extensive quantitative and qualitative analysis of Navi's performance, and provide insights into the opportunities for future research in agent development and data generation using Windows Agent Arena. Webpage: https://microsoft.github.io/WindowsAgentArena Code: https://github.com/microsoft/WindowsAgentArena

Abstract of Windows Agent Arena: Evaluating Multi-Modal OS Agents at Scale (arXiv:2409.08264, CC0)
5
Models scored in lab cards
3
Launch posts list it, from 1 lab
3
System cards report it, from 3 labs

UI-TARS-2 leads with 50.6% among models released by September 2025

Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.

The newest model with a score here came out in September 2025, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 1 UI-TARS-2 50.6%
  2. 2 UI-TARS-1.5 42.1%
  3. 3 Seed1.5-VL 39.6%
  4. 4 Qwen3-VL-235B-A22B 32.1%
  5. 5 InternVL3.5-241B-A28B 18%

Source: Labs’ model cards

#ModelScoreSettingDateSource
1 UI-TARS-2 50.6% Sep 2025 Lab model card
2 UI-TARS-1.5 42.1% Apr 2025 Lab model card
3 Seed1.5-VL 39.6% May 2025 Lab model card
4 Qwen3-VL-235B-A22B 32.1% Nov 2025 Lab model card
5 InternVL3.5-241B-A28B 18% Aug 2025 Lab model card

2 models have held number one in labs’ own numbers since its release in September 2024

Lab claims count from the day the card came out, independent runs from the model’s release.

ByteDance Seed
Lab claims Not tested since Nov 2025
UI-TARS-2 50.6%

Source: Labs’ model cards

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

Reported by the lab in its model card Best so far
0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) UI-TARS-2 UI-TARS-1.5 0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) UI-TARS-2 UI-TARS-1.5

Source: Labs’ model cards

No launch post has listed it since September 2025

Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.

ByteDance Seed
DateLaunch postScoreAs the post writes it
Sep 2, 2025 UI-TARS-2 50.6 WAA (WindowsAgentArena)
May 12, 2025 Seed1.5-VL 39.6 Windows Agent Arena
Apr 16, 2025 UI-TARS-1.5 42.1 Windows Agent Arena (50 steps)

3 system cards report it, from 3 labs

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

DateDocumentScoreAs the document writes itSection
Nov 26, 2025 Qwen3-VL-235B-A22B technical report 32.1 WindowsAA (Table 2) Capabilities
Aug 25, 2025 InternVL3.5-241B-A28B technical report 18 WindowsAgentArena, 50 steps (Table 10) Capabilities
May 11, 2025 Seed1.5-VL technical report 39.6 Windows Agent Arena, thinking (Table 8) Capabilities

More in Computer and browser use

All 69 in Computer and browser use
  • BrowseComp In use Hard-to-find facts that need persistent web browsing. Short verifiable answers graded for exact correctness. Claude Fable 5 93.3%
  • ScreenSpot-Pro In use GUI grounding on high-resolution professional-software screenshots. The model must locate the target UI element. GPT-6 Astra 92.7%
  • AndroidWorld In use Agents complete 116 tasks across 20 real Android apps in an emulator. Each task checks the device's system state to judge success. GPT-6 Astra 100%
  • OSWorld 2.1 In use Agents complete 108 long-horizon workflows across 31 self-hosted websites and desktop apps, averaging 318 tool calls. Scored by binary completion and checkpoint partial credit. Claude Opus 5.5 81.8%
  • WebArena-Verified In use Agents complete 812 audited WebArena tasks on self-hosted websites. Deterministic evaluators check the agent's answer and captured network traces. Muse Spark 1.1 69%
  • MobileWorld In use Agents complete 201 tasks across 20 mobile apps, including tasks that need user clarification or MCP tools. Backend checks verify success. GPT-5 55.3%