Benchmark Almanac

OSWorld

Claude Sonnet 4.6 72.1% leads since February 2026
Seed2.1 Pro 78.8% leads since June 2026
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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.

Made by
XLANG Lab, HKU
Released
April 2024
Kind
Desktop apps
Level
Everyday
Scored
Checked automatically
Answers
Agent task
Tasks
All public
Strongest model tested
Claude Sonnet 4.6 #56 on the capability index
Last in a launch post
June 2026, dropped for a newer version
Last model added
June 2026
Scores refreshed
November 12th, 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)
8
Models scored on a board Epoch AI copied
12
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 February 2026

Best score per model from OS World Website, as Epoch AI copied it. We don’t read that board ourselves yet. Where a model ran with several settings, we keep its best.

Seed2.1 Pro leads with 78.8%, claims included

Best score per model from every source, including labs’ own numbers and claims Epoch AI collected from reports and papers. Labs pick their own settings, so a claim can beat an independent run of the same model.

The newest model with a score here came out in February 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 Kimi K2.5 63.3%
  3. 3 Claude Sonnet 4.5 no thinking 62.9%
  4. 4 Claude Sonnet 4 43.9%
  5. 5 Claude 3.7 Sonnet 35.8%
  6. 6 computer-use-preview-2025-03-11 31.3%
  7. 7 o3 medium 23%
  8. 8 Qwen2.5-72B 5.00%

Source: OS World Website, via Epoch AI (CC BY 4.0)

#ModelScoreSettingDateSource
1 Claude Sonnet 4.6 72.1% no thinking, claude-sonnet-4-6 (100 steps) Feb 2026 OS World Website, via Epoch AI
2 Kimi K2.5 63.3% Kimi-K2.5 Jan 2026 OS World Website, via Epoch AI
3 Claude Sonnet 4.5 62.9% no thinking, claude-sonnet-4-5-20250929 (100 steps) Sep 2025 OS World Website, via Epoch AI
4 Claude Sonnet 4 43.9% claude-4-sonnet-20250514 (50 steps) May 2025 OS World Website, via Epoch AI
5 Claude 3.7 Sonnet 35.8% claude-3-7-sonnet-20250219 (50 steps) Feb 2025 OS World Website, via Epoch AI
6 computer-use-preview-2025-03-11 31.3% computer-use-preview (50 steps) Mar 2025 OS World Website, via Epoch AI
7 o3 23% medium, o3 (100 steps) Apr 2025 OS World Website, via Epoch AI
8 Qwen2.5-72B 5.00% qwen2.5-vl-72b-instruct (100 steps) Sep 2024 OS World Website, via Epoch AI
#ModelScoreSettingDateSource
1 Seed2.1 Pro 78.8% Jun 2026 Lab model card
2 Claude Sonnet 4.6 72.1% no thinking, claude-sonnet-4-6 (100 steps) Feb 2026 OS World Website, via Epoch AI
3 Claude Opus 4.5 66.3% no thinking, Claude Opus 4.5 Nov 2025 Claim in Anthropic annoucement, via Epoch AI
4 Kimi K2.5 63.3% Kimi-K2.5 Jan 2026 OS World Website, via Epoch AI
5 Claude Sonnet 4.5 62.9% no thinking, claude-sonnet-4-5-20250929 (100 steps) Sep 2025 OS World Website, via Epoch AI
6 GLM-5V-Turbo 62.3% Apr 2026 Lab model card
7 Seed1.8 61.9% Dec 2025 Lab model card
8 UI-TARS-2 47.5% Sep 2025 Lab model card
9 Claude Sonnet 4 43.9% claude-4-sonnet-20250514 (50 steps) May 2025 OS World Website, via Epoch AI
10 UI-TARS-1.5 42.5% Apr 2025 Lab model card
11 OpenAI Computer-Using Agent (CUA) 38.1% Jan 2025 Lab model card
12 Qwen3-VL-235B-A22B 38.1% Sep 2025 Lab model card
13 GLM-4.6V 37.2% Dec 2025 Lab model card
14 Seed1.5-VL 36.7% May 2025 Lab model card
15 Claude 3.7 Sonnet 35.8% claude-3-7-sonnet-20250219 (50 steps) Feb 2025 OS World Website, via Epoch AI
16 GLM-4.5V 35.8% Aug 2025 Lab model card
17 computer-use-preview-2025-03-11 31.3% computer-use-preview (50 steps) Mar 2025 OS World Website, via Epoch AI
18 o3 23% medium, o3 (100 steps) Apr 2025 OS World Website, via Epoch AI
19 Claude 3.5 Sonnet (October 2024) 14.9% Oct 2024 Lab model card
20 GLM-4.1V-9B-Thinking 14.9% Jul 2025 Lab model card
21 Qwen2.5-VL-72B 8.83% Jan 2025 Lab model card
22 Qwen2.5-72B 5.00% qwen2.5-vl-72b-instruct (100 steps) Sep 2024 OS World Website, via Epoch AI

Labs report scores for 13 models in their cards. Epoch AI collected claims for 1 model from labs’ reports and papers. Switch the scores above to rank them together.

6 models have held number one on OS World Website since its release in April 2024 10 models have held number one with claims included since its release in April 2024

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

Qwen Anthropic Moonshot AI OpenAI ByteDance Seed Z.ai
OS World Website, via Epoch AI Not tested since Feb 2026
Lab claims Not tested since Jun 2026
Seed2.1 Pro 78.8%

Sources: OS World Website, via Epoch AI (CC BY 4.0) and 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 On another leaderboard, collected by Epoch AI A claim Epoch AI collected from a report or paper 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

Sources: Other boards, via Epoch AI (CC BY 4.0), labs’ model cards and claims collected by Epoch AI (CC BY 4.0)

Labs headline it less often now, last in June 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
Jun 23, 2026 Seed2.1 Pro 78.8 OSWorld (Generalist CUA setting)
Apr 1, 2026 GLM-5V-Turbo 62.3 OSWorld 62.3
Dec 18, 2025 Seed1.8 61.9 OSWorld
Dec 8, 2025 GLM-4.6V 37.2 OSWorld
Sep 23, 2025 Qwen3-VL-235B-A22B 38.1 OSWorld
Sep 2, 2025 UI-TARS-2 47.5 OSWorld
Aug 11, 2025 GLM-4.5V 35.8 OSWorld
Jul 1, 2025 GLM-4.1V-9B-Thinking 14.9 OSWorld
May 12, 2025 Seed1.5-VL 36.7 OSWorld
Apr 16, 2025 UI-TARS-1.5 42.5 OSworld (100 steps)
Jan 28, 2025 Qwen2.5-VL-72B 8.83 OSWorld
Jan 23, 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
Jun 23, 2026 Seed2.1 Pro model card 78.8 OSWorld, Generalist CUA setting (Table 4). The 2.5.1 text says 78.2 Capabilities
Mar 21, 2026 Seed1.8 model card 61.9 OSWorld (Table 5) Capabilities
Jan 1, 2026 GLM-4.6V technical report 37.2 OSWorld, 100-step budget, GLM-4.6V thinking (Table 2) Capabilities
Nov 26, 2025 Qwen3-VL-235B-A22B technical report 38.1 OSWorld (Table 2) Capabilities
Aug 13, 2025 GLM-4.5V technical report 35.8 OSWorld, 100-step budget, GLM-4.5V thinking (Table 2) Capabilities
Jul 1, 2025 GLM-4.1V-9B-Thinking technical report 14.9 OSWorld, 100-step budget, GLM-4.1V-9B-Thinking thinking (Table 2) Capabilities
May 11, 2025 Seed1.5-VL technical report 36.7 OSWorld, thinking (Table 8) Capabilities
Feb 19, 2025 Qwen2.5-VL-72B technical report 8.83 OSWorld (Table 9) Capabilities
Jan 23, 2025 OpenAI Computer-Using Agent (CUA) system card 38.1 OSWorld, CUA performance 38.1% (4.7, March 11, 2025 update) Capabilities
Oct 22, 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 Moonshot AI OpenAI
OSWorld 2.1 14 leaders
OSWorld Not tested since Feb 2026
OSWorld-Verified Passed 85% in Jun 2026, by Claude Fable 5
OSWorld 2.0 Replaced by 2.0 Aug, Aug 2026
OSWorld 2.1 1 leader

Sources: Official leaderboards, boards copied by Epoch AI (CC BY 4.0) and labs’ model cards

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%
  • 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%
  • 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%