WildClawBench, middle of three requests

Claude Fable 5.1 on “Triage support messages, investigate hidden context, route issues, and draft replies”

Longer

2.52× longer

Worked 152% past the request, 6 min 6 s over.

Asked for
4 minutes
Worked
10 min 6 s
Grade
Score 72.5 of 100
Judged afterwards.
How it ended
Ended on its own
Every detail of this run
Agent
Claude Fable 5.1, in Claude Code
Benchmark
WildClawBench
Asked for
4 minutes: “Please work on this task for a full 4 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
10 min 6 s (606 s)
Ratio
2.52× the request
How it ended
Ended on its own
Grade
0.725
Task grader score, 0 to 1 (a model judge only where the task calls for one). No official pass rule.
Score
72.5 of 100
Judged afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
dnag5oblpy
Data release
26 Sep 2026
The other requests for Claude Fable 5.1 on this task, and the other agents at this request
Fable on this taskAskedWorkedSplitResult
Shortest1 minute10 min 3 s10.05× longer
Middle (this run)4 minutes10 min 6 s2.52× longer
Longest15 minutes12 min 41 s1.18× shorter
Other agents, middle request
GPT 6 Astra4 minutes4 min 23 s1.10× longer
GPT 5.6 Sol4 minutes5 min 16 s1.32× longer

See it on the chart. Transcripts are not published yet.

Data and citation

Upstream: Ding et al., 2026