Benchmark Almanac

CUA-World-Long

GPT-5.4 27.5% leads since Apr 2026 Not in model cards

Computer-use agents do one long task in each of 200 real applications, such as 3D Slicer, GIMP and OpenEMR, often needing 500 or more steps. Checklist verifiers with privileged state score each task.

Part of CUA-World, over 10K tasks on Linux, Windows and Android apps chosen by US GDP share, with train and test splits. Headline is pass rate. Best listed run was 27.5%.

In the authors’ words

Computer-use agents hold the promise of assisting in a wide range of digital economic activities. However, current research has largely focused on short-horizon tasks over a limited set of software with limited economic value, such as basic e-commerce and OS-configuration tasks. A key reason is that creating environments for complex software requires significant time and human effort, and therefore does not scale. To address this, we introduce Gym-Anything, a framework for converting any software into an interactive computer-use environment. We frame environment creation itself as a multi-agent task: a coding agent writes setup scripts, downloads real-world data, and configures the software, while producing evidence of correct setup. An independent audit agent then verifies evidence for the environment setup against a quality checklist. Using a taxonomy of economically valuable occupations grounded in U.S. GDP data, we apply this pipeline to 200 software applications with broad occupational coverage. The result is CUA-World, a collection of over 10K long-horizon tasks spanning domains from medical science and astronomy to engineering and enterprise systems, each configured with realistic data along with train and test splits. CUA-World also includes CUA-World-Long, a challenging long-horizon benchmark with tasks often requiring over 500 steps, far exceeding existing benchmarks. Distilling successful trajectories from the training split into a 2B vision-language model outperforms models 2× its size. We also apply the same auditing principle at test time: a separate VLM reviews completed trajectories and provides feedback on what remains, improving Gemini-3-Flash on CUA-World-Long from 11.5% to 14.0%. We release all code, infrastructure, and benchmark data to facilitate future research in realistic computer-use agents.

Abstract of Gym-Anything: Turn any Software into an Agent Environment (arXiv:2604.06126, CC0)
Made by Carnegie Mellon University (Welleck and Neubig labs, CMU L3) Released Apr 2026 Desktop apps All tasks public Last model added Mar 2026 Scores refreshed 2 Nov 2026
Level
Expert Specialists with years of training, often over hours of work
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.
4
Models scored on its own leaderboard

GPT-5.4 leads with 27.5% among models released by Mar 2026

Best score per model from the benchmark's own leaderboard, read on 2 Nov 2026. Where a model ran with several settings or harnesses, we keep its best.

The newest model with a score here came out in Mar 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 GPT-5.4 27.5%
  2. 2 Gemini 3 Flash 14%
  3. 3 Claude Sonnet 4.6 6.00%
  4. 4 Kimi K2.5 5.50%
#ModelScoreSettingDateSource
1 GPT-5.4 27.5% Direct (2000 steps) Mar 2026 Official leaderboard
2 Gemini 3 Flash 14% Test-Time Auditing Dec 2025 Official leaderboard
3 Claude Sonnet 4.6 6.00% Direct (500 steps) Feb 2026 Official leaderboard
4 Kimi K2.5 5.50% Direct (500 steps) Jan 2026 Official leaderboard

Number one over time

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

OpenAI
Own leaderboard Not tested since Apr 2026
GPT-5.4 27.5%

Scores over time

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

On the benchmark’s own leaderboard Best so far
0% 20% 40% 60% 80% 100% 2026 Near the ceiling (85%) GPT-5.4 Gemini 3 Flash 0% 20% 40% 60% 80% 100% 2026 Near the ceiling (85%) GPT-5.4 Gemini 3 Flash

No lab model card reports it yet

We read the headline results of 479 launch posts from 51 labs, and none of them list this benchmark.

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%
  • 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. Kimi K3 74.4%