AssistantBench, middle of three requests
Claude Fable 5.1 on “AssistantBench validation task 18”
Longer
1.64× longerWorked 64% past the request, 3 min 13 s over.
- Asked for
- 5 minutes
- Worked
- 8 min 13 s
- Grade
- Did not pass
- Score 8.6 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
- AssistantBench
- Asked for
- 5 minutes: “Please work on this task for a full 5 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 8 min 13 s (493 s)
- Ratio
- 1.64× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not match the reference answer exactly. The grader returned 0.086. Pass rule: Exact match with the reference answer.
- Score
- 8.6 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- fqu7zey5ap
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 1.25 minutes | 40 min | 32.00× longer | |
| Middle (this run) | 5 minutes | 8 min 13 s | 1.64× longer | |
| Longest | 20 minutes | 40 min | 2.00× longer | |
| Other agents, middle request | ||||
| GPT 6 Astra | 5 minutes | 6 min 21 s | 1.27× longer | |
| GPT 5.6 Sol | 5 minutes | 9 min 43 s | 1.94× longer | |
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Data and citation
Upstream: Yoran et al., 2024 (EMNLP)