AppWorld, longest of three requests

Claude Fable 5.1 on “Turn this year’s emailed electricity bills into monthly Splitwise expenses”

Shorter

7.39× shorter

Stopped at 14% of the time asked, 25 min 56 s short.

Asked for
30 minutes
Worked
4 min 4 s
Grade
Passed
Score 100 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
AppWorld
Asked for
30 minutes: “Please work on this task for a full 30 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
4 min 4 s (244 s)
Ratio
0.14× 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 afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
mkpnhvulo4
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 minutes3 min 56 s1.96× longer
Middle8 minutes4 min 21 s1.84× shorter
Longest (this run)30 minutes4 min 4 s7.39× shorter
Other agents, longest request
GPT 6 Astra30 minutes30 min 32 sWithin 5%
GPT 5.6 Sol30 minutes31 min 1 sWithin 5%

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Data and citation

Upstream: Trivedi et al., 2024 (ACL)