OSWorld 2.0, longest of three requests
Claude Fable 5.1 on “MuseScore transcription”
Shorter
1.58× shorterStopped at 63% of the time asked, 1 h 32 min short.
- Asked for
- 250 minutes
- Worked
- 2 h 38 min
- Grade
- Did not pass
- Score 76.6 of 100. Graded during the run.
- How it ended
- Ended on its own
Every detail of this run
- Agent
- Claude Fable 5.1, in Claude Code
- Benchmark
- OSWorld 2.0
- Asked for
- 250 minutes: “Please work on this task for a full 250 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 2 h 38 min (9,507 s)
- Ratio
- 0.63× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not meet every checkpoint. The grader returned 0.766. Pass rule: Binary completion: a score of 1.00, with every checkpoint met.
- Score
- 76.6 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- 443676ywfx
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 15 minutes | 11 min 46 s | 1.27× shorter | |
| Middle | 60 minutes | 43 min | 1.40× shorter | |
| Longest (this run) | 250 minutes | 2 h 38 min | 1.58× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 250 minutes | 4 h 12 min | Within 5% | |
| GPT 5.6 Sol | 250 minutes | 45 min 30 s | 5.49× shorter | |
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Data and citation
Upstream: Yuan et al., 2026