WildClawBench, longest of three requests

Claude Fable 5.1 on “Find a shortest coauthorship chain between two scholars”

Shorter

1.57× shorter

Stopped at 64% of the time asked, 14 min 33 s short.

Asked for
40 minutes
Worked
25 min 27 s
Grade
Score 0 of 100
Nothing to grade, counted as 0.
How it ended
Ended on its own
Every detail of this run
Agent
Claude Fable 5.1, in Claude Code
Benchmark
WildClawBench
Asked for
40 minutes: “Please work on this task for a full 40 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
25 min 27 s (1,527 s)
Ratio
0.64× the request
How it ended
Ended on its own
Grade
0
Task grader score, 0 to 1 (a model judge only where the task calls for one). No official pass rule.
Score
0 of 100
Nothing to grade, counted as 0. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
firc4qmoog
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
Shortest2 minutes26 min 6 s13.05× longer
Middle8 minutes26 min 29 s3.31× longer
Longest (this run)40 minutes25 min 27 s1.57× shorter
Other agents, longest request
GPT 6 Astra40 minutes1 h 20 min2.00× longer
GPT 5.6 Sol40 minutes1 h 20 min2.00× longer

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

Data and citation

Upstream: Ding et al., 2026