Terminal-Bench 4.0, longest of three requests
Claude Fable 5.1 on “Build and apply a five-day ERP/MES/WMS production plan”
Shorter
2.48× shorterStopped at 40% of the time asked, 47 min 41 s short.
- Asked for
- 80 minutes
- Worked
- 32 min 19 s
- Grade
- Did not pass
- Score 0 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
- Terminal-Bench 4.0
- Asked for
- 80 minutes: “Please work on this task for a full 80 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 32 min 19 s (1,939 s)
- Ratio
- 0.40× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not pass the task's tests. The grader returned 0. Pass rule: The task's tests pass.
- Score
- 0 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- 6czze7amwy
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 5 minutes | 26 min 10 s | 5.23× longer | |
| Middle | 20 minutes | 38 min 9 s | 1.91× longer | |
| Longest (this run) | 80 minutes | 32 min 19 s | 2.48× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 80 minutes | 1 h 20 min | Within 5% | |
| GPT 5.6 Sol | 80 minutes | 1 h 21 min | Within 5% | |
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Data and citation
Upstream: Merrill et al., 2026 (ICLR)