AppWorld, longest of three requests

Claude Fable 5.1 on “Collect artist recommendations from email and text conversations, then follow them”

Shorter

8.25× shorter

Stopped at 12% of the time asked, 26 min 22 s short.

Asked for
30 minutes
Worked
3 min 38 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
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
3 min 38 s (218 s)
Ratio
0.12× 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
rng72fgxsr
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 minutes2 min 56 s1.46× longer
Middle8 minutes3 min 16 s2.45× shorter
Longest (this run)30 minutes3 min 38 s8.25× shorter
Other agents, longest request
GPT 6 Astra30 minutes30 min 39 sWithin 5%
GPT 5.6 Sol30 minutes31 minWithin 5%

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Data and citation

Upstream: Trivedi et al., 2024 (ACL)