Terminal-Bench 4.0, middle of three requests
Claude Fable 5.1 on “Rebuild a retired production risk scorer from black-box behavior”
Longer
1.08× longerWorked 8% past the request, 2 min 2 s over.
- Asked for
- 25 minutes
- Worked
- 27 min 2 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
- 25 minutes: “Please work on this task for a full 25 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 27 min 2 s (1,622 s)
- Ratio
- 1.08× 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
- pmhy2b3hif
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 6 minutes | 19 min 44 s | 3.29× longer | |
| Middle (this run) | 25 minutes | 27 min 2 s | 1.08× longer | |
| Longest | 100 minutes | 22 min 46 s | 4.39× shorter | |
| Other agents, middle request | ||||
| GPT 6 Astra | 25 minutes | 25 min 15 s | Within 5% | |
| GPT 5.6 Sol | 25 minutes | 25 min 35 s | Within 5% | |
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Data and citation
Upstream: Merrill et al., 2026 (ICLR)