TUA-Bench, middle of three requests
Claude Fable 5.1 on “Place heater for sensors”
Longer
1.47× longerWorked 47% past the request, 6 min 59 s over.
- Asked for
- 15 minutes
- Worked
- 21 min 59 s
- Grade
- Did not pass
- Score 66 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
- TUA-Bench
- Asked for
- 15 minutes: “Please work on this task for a full 15 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 21 min 59 s (1,319 s)
- Ratio
- 1.47× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not complete the task in full. The grader returned 0.66. Pass rule: Full completion: a reward of 1 on the final state.
- Score
- 66 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- ykszyzuvto
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 4 minutes | 2 h | 30.00× longer | |
| Middle (this run) | 15 minutes | 21 min 59 s | 1.47× longer | |
| Longest | 60 minutes | 26 min 57 s | 2.23× shorter | |
| Other agents, middle request | ||||
| GPT 6 Astra | 15 minutes | 15 min 29 s | Within 5% | |
| GPT 5.6 Sol | 15 minutes | 9 min 34 s | 1.57× shorter | |
See it on the chart. Transcripts are not published yet.
Data and citation
Upstream: Chen et al., 2026