Benchmark Almanac

OSWorld

Claude Sonnet 4.6 72.1% leads since Feb 2026 Fading

Agents complete 369 real computer tasks in Ubuntu desktop apps through screenshots and mouse and keyboard actions. Execution-based scripts check the final state.

OSWorld-Verified fixed task errors in July 2025, and OSWorld 2.0 replaced it as the latest version in June 2026.

In the authors’ words

Autonomous agents that accomplish complex computer tasks with minimal human interventions have the potential to transform human-computer interaction, significantly enhancing accessibility and productivity. However, existing benchmarks either lack an interactive environment or are limited to environments specific to certain applications or domains, failing to reflect the diverse and complex nature of real-world computer use, thereby limiting the scope of tasks and agent scalability. To address this issue, we introduce OSWorld, the first-of-its-kind scalable, real computer environment for multimodal agents, supporting task setup, execution-based evaluation, and interactive learning across various operating systems such as Ubuntu, Windows, and macOS. OSWorld can serve as a unified, integrated computer environment for assessing open-ended computer tasks that involve arbitrary applications. Building upon OSWorld, we create a benchmark of 369 computer tasks involving real web and desktop apps in open domains, OS file I/O, and workflows spanning multiple applications. Each task example is derived from real-world computer use cases and includes a detailed initial state setup configuration and a custom execution-based evaluation script for reliable, reproducible evaluation. Extensive evaluation of state-of-the-art LLM/VLM-based agents on OSWorld reveals significant deficiencies in their ability to serve as computer assistants. While humans can accomplish over 72.36% of the tasks, the best model achieves only 12.24% success, primarily struggling with GUI grounding and operational knowledge. Comprehensive analysis using OSWorld provides valuable insights for developing multimodal generalist agents that were not possible with previous benchmarks. Our code, environment, baseline models, and data are publicly available at https://os-world.github.io.

Abstract of OSWorld: Benchmarking Multimodal Agents for Open-Ended Tasks in Real Computer Environments (arXiv:2404.07972, CC0)
Made by XLANG Lab , HKU Released Apr 2024 Desktop apps All tasks public Last in a launch post Jun 2026 , dropped for a newer version Last model added Jun 2026 Scores refreshed 31 Oct 2026
Level
Everyday Most adults, without training
Scored
Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
Answers
Agent task Many steps in a terminal, browser, desktop, app, game or robot.
9
Models scored in Epoch AI data
11
Launch posts list it, from 4 labs
10
System cards report it, from 5 labs

Claude Sonnet 4.6 leads with 72.1% among models released by Feb 2026

Best score per model in Epoch AI’s data. Where a model ran with several settings or harnesses, we keep its best.

The newest model with a score here came out in Feb 2026, and nobody has tested a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 1 Claude Sonnet 4.6 no thinking 72.1%
  2. 2 Claude Opus 4.5 no thinking 66.3%
  3. 3 Kimi K2.5 63.3%
  4. 4 Claude Sonnet 4.5 no thinking 62.9%
  5. 5 Claude Sonnet 4 43.9%
  6. 6 Claude 3.7 Sonnet 35.8%
  7. 7 computer-use-preview-2025-03-11 31.3%
  8. 8 o3 medium 23%
  9. 9 Qwen2.5-72B 5.00%
#ModelScoreSettingDateSource
1 Claude Sonnet 4.6 72.1% no thinking, claude-sonnet-4-6 (100 steps) Feb 2026 Epoch AI
2 Claude Opus 4.5 66.3% no thinking, Claude Opus 4.5 Nov 2025 Epoch AI
3 Kimi K2.5 63.3% Kimi-K2.5 Jan 2026 Epoch AI
4 Claude Sonnet 4.5 62.9% no thinking, claude-sonnet-4-5-20250929 (100 steps) Sep 2025 Epoch AI
5 Claude Sonnet 4 43.9% claude-4-sonnet-20250514 (50 steps) May 2025 Epoch AI
6 Claude 3.7 Sonnet 35.8% claude-3-7-sonnet-20250219 (50 steps) Feb 2025 Epoch AI
7 computer-use-preview-2025-03-11 31.3% computer-use-preview (50 steps) Mar 2025 Epoch AI
8 o3 23% medium, o3 (100 steps) Apr 2025 Epoch AI
9 Qwen2.5-72B 5.00% qwen2.5-vl-72b-instruct (100 steps) Sep 2024 Epoch AI

Labs report scores for 12 models in their cards. We plot every source in the charts below.

6 models have held number one since its release in Apr 2024

Lab claims count from the day the card came out, independent runs from the model’s release. We draw one row each for Epoch AI’s runs and what labs claim in their cards.

Qwen Anthropic OpenAI ByteDance Seed
Epoch AI runs Not tested since Feb 2026
Lab claims Not tested since Jun 2026
Seed2.1 Pro 78.8%

Scores over time

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

Run or collected by Epoch AI Reported by the lab in its model card Best so far
0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) Seed2.1 Pro Claude Sonnet 4.6 Claude Opus 4.5 UI-TARS-2 UI-TARS-1.5 OpenAI Computer-Using Agent (CUA) Claude 3.5 Sonnet (October 2024) 0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) Seed2.1 Pro Claude Sonnet 4.6

Labs headline it less often now, last in Jun 2026

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.

OpenAI
Qwen
ByteDance Seed
Z.ai
DateLaunch postScoreAs the post writes it
23 Jun 2026 Seed2.1 Pro 78.8 OSWorld (Generalist CUA setting)
18 Dec 2025 Seed1.8 61.9 OSWorld
8 Dec 2025 GLM-4.6V 37.2 OSWorld
23 Sep 2025 Qwen3-VL-235B-A22B 38.1 OSWorld
2 Sep 2025 UI-TARS-2 47.5 OSWorld
11 Aug 2025 GLM-4.5V 35.8 OSWorld
1 Jul 2025 GLM-4.1V-9B-Thinking 14.9 OSWorld
12 May 2025 Seed1.5-VL 36.7 OSWorld
16 Apr 2025 UI-TARS-1.5 42.5 OSworld (100 steps)
28 Jan 2025 Qwen2.5-VL-72B 8.83 OSWorld
23 Jan 2025 OpenAI Computer-Using Agent (CUA) 38.1 OSWorld (computer use)

10 system cards report it, from 5 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
23 Jun 2026 Seed2.1 Pro model card 78.8 OSWorld, Generalist CUA setting (Table 4). The 2.5.1 text says 78.2 Capabilities
21 Mar 2026 Seed1.8 model card 61.9 OSWorld (Table 5) Capabilities
1 Jan 2026 GLM-4.6V technical report 37.2 OSWorld, 100-step budget, GLM-4.6V thinking (Table 2) Capabilities
26 Nov 2025 Qwen3-VL-235B-A22B technical report 38.1 OSWorld (Table 2) Capabilities
13 Aug 2025 GLM-4.5V technical report 35.8 OSWorld, 100-step budget, GLM-4.5V thinking (Table 2) Capabilities
1 Jul 2025 GLM-4.1V-9B-Thinking technical report 14.9 OSWorld, 100-step budget, GLM-4.1V-9B-Thinking thinking (Table 2) Capabilities
11 May 2025 Seed1.5-VL technical report 36.7 OSWorld, thinking (Table 8) Capabilities
19 Feb 2025 Qwen2.5-VL-72B technical report 8.83 OSWorld (Table 9) Capabilities
23 Jan 2025 OpenAI Computer-Using Agent (CUA) system card 38.1 OSWorld, CUA performance 38.1% (4.7, March 11, 2025 update) Capabilities
22 Oct 2024 Claude 3.5 Sonnet (October 2024) model card 14.9 OSWorld, screenshot only, standard 15 steps, overall success rate 14.9%. With an optimized prompt and 50 steps 22% (Table 1, 2.1) Capabilities

Versions

We switch the top row to each new version when it comes out. Open it for one row per version. An old version stays in play while people still test it, so whoever first takes it past 85% gets credit for closing it out.

Qwen Anthropic OpenAI ByteDance Seed
OSWorld 2.1 25 leaders
OSWorld Not tested since Jun 2026
Seed2.1 Pro 78.8%
OSWorld-Verified Passed 85% in Jun 2026, by Claude Fable 5
Qwen 3.8 Max 86.1%
OSWorld 2.0 4 leaders
OSWorld 2.0 (Aug 2026) Replaced by 2.1, Sep 2026
OSWorld 2.1 2 leaders

More in Computer and browser use

All 56 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%
  • 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. Kimi K3 74.4%
  • RecreationBench In use Agents explore a running reference app and rebuild it, across 250 tasks on five platforms. Programmatic tests and a VLM judge score the result. GPT-6 Astra 58.1%