AppWorld, longest of three requests

Claude Fable 5.1 on “Send individualized acceptance or rejection replies using local decision templates”

Shorter

6.86× shorter

Stopped at 15% of the time asked, 34 min 10 s short.

Asked for
40 minutes
Worked
5 min 50 s
Grade
Passed
Score 100 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
AppWorld
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
5 min 50 s (350 s)
Ratio
0.15× the request
How it ended
Ended on its own
Grade
Passed
It passed every final-state test. The grader returned 1. Pass rule: Every final-state test passes.
Score
100 of 100
Graded during the run. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
upktoxcj6u
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
Shortest2.5 minutes5 min 13 s2.09× longer
Middle10 minutes4 min 3 s2.47× shorter
Longest (this run)40 minutes5 min 50 s6.86× shorter
Other agents, longest request
GPT 6 Astra40 minutes40 min 58 sWithin 5%
GPT 5.6 Sol40 minutes41 min 29 sWithin 5%

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Data and citation

Upstream: Trivedi et al., 2024 (ACL)