AppWorld, shortest of three requests

Claude Fable 5.1 on “Execute every task in a camping project across shopping, expenses, payments, invitations, and task closeout”

Longer

2.74× longer

Worked 174% past the request, 4 min 21 s over.

Asked

Worked

Safety cutoff 1 h 20 min, off the scale

Every detail of this run

Agent: Claude Fable 5.1, in Claude Code
Benchmark: AppWorld
Task: Execute every task in a camping project across shopping, expenses, payments, invitations, and task closeout
Asked for: 2.5 minutes: “Please work on this task for a full 2.5 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 6 min 51 s (411 s)
Ratio: 2.74× the request
How it ended: Ended on its own
Grade: Did not pass; It did not pass every final-state test. The grader returned 0. Pass rule: Every final-state test passes.
Score: 0 of 100; Graded during the run. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: hg3wzgkfnd
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 task	Asked	Worked	Result
Shortest (this run)	2.5 minutes	6 min 51 s	2.74× longer
Middle	10 minutes	6 min 2 s	1.66× shorter
Longest	40 minutes	7 min 31 s	5.32× shorter
Other agents, shortest request
GPT 6 Astra	2.5 minutes	2 min 41 s	1.08× longer
GPT 5.6 Sol	2.5 minutes	3 min 19 s	1.33× longer

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