AppWorld, longest of three requests

Claude Fable 5.1 on “Calculate and send individualized lunch-cost requests with shared tip and delivery”

Shorter

6.97× shorter

Stopped at 14% of the time asked, 21 min 25 s short.

Asked for
25 minutes
Worked
3 min 35 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
25 minutes: “Please work on this task for a full 25 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
3 min 35 s (215 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 during the run. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
fwpkyqgsbv
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
Shortest1.5 minutes4 min2.66× longer
Middle6 minutes2 min 44 s2.20× shorter
Longest (this run)25 minutes3 min 35 s6.97× shorter
Other agents, longest request
GPT 6 Astra25 minutes26 min 11 sWithin 5%
GPT 5.6 Sol25 minutes25 min 33 sWithin 5%

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Data and citation

Upstream: Trivedi et al., 2024 (ACL)