Terminal-Bench 4.0, middle of three requests
Claude Fable 5.1 on “Build and apply a five-day ERP/MES/WMS production plan”
Longer
1.91× longerWorked 91% past the request, 18 min 9 s over.
- Asked for
- 20 minutes
- Worked
- 38 min 9 s
- Grade
- Passed
- Score 100 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
- 20 minutes: “Please work on this task for a full 20 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 38 min 9 s (2,289 s)
- Ratio
- 1.91× the request
- How it ended
- Ended on its own
- Grade
- Passed
- It passed the task's tests. The grader returned 1. Pass rule: The task's tests pass.
- Score
- 100 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- l3fkccqwvg
- 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 (this run) | 20 minutes | 38 min 9 s | 1.91× longer | |
| Longest | 80 minutes | 32 min 19 s | 2.48× shorter | |
| Other agents, middle request | ||||
| GPT 6 Astra | 20 minutes | 20 min 23 s | Within 5% | |
| GPT 5.6 Sol | 20 minutes | 21 min 20 s | 1.07× longer | |
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Data and citation
Upstream: Merrill et al., 2026 (ICLR)