ProgramBench, shortest of three requests
Claude Fable 5.1 on “stathissideris/ditaa”
Shorter
1.52× shorterStopped at 66% of the time asked, 2 min 44 s short.
- Asked for
- 8 minutes
- Worked
- 5 min 16 s
- Grade
- Did not pass
- Score 15.4 of 100. Graded afterwards.
- How it ended
- Ended on its own
Every detail of this run
- Agent
- Claude Fable 5.1, in Claude Code
- Benchmark
- ProgramBench
- Asked for
- 8 minutes: “Please work on this task for a full 8 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 5 min 16 s (316 s)
- Ratio
- 0.66× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not pass every hidden test. The grader returned 0.154. Pass rule: Resolved: every hidden test passes.
- Score
- 15.4 of 100
- Graded afterwards. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- itw3htiuzz
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest (this run) | 8 minutes | 5 min 16 s | 1.52× shorter | |
| Middle | 30 minutes | 2 h 29 min | 4.98× longer | |
| Longest | 125 minutes | 22 s | 348.84× shorter | |
| Other agents, shortest request | ||||
| GPT 6 Astra | 8 minutes | 8 min 12 s | Within 5% | |
| GPT 5.6 Sol | 8 minutes | 21 min 29 s | 2.69× longer | |
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Data and citation
Upstream: Yang et al., 2026