AppWorld, middle of three requests

Claude Fable 5.1 on “Merge two photo collections into a ZIP and send it to both parents”

Shorter

1.68× shorter

Stopped at 60% of the time asked, 4 min 2 s short.

Asked for
10 minutes
Worked
5 min 58 s
Grade
Did not pass
Score 0 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
10 minutes: “Please work on this task for a full 10 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
5 min 58 s (358 s)
Ratio
0.60× 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
at3wwi2d6u
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 minutes4 min 22 s1.75× longer
Middle (this run)10 minutes5 min 58 s1.68× shorter
Longest40 minutes5 min 33 s7.20× shorter
Other agents, middle request
GPT 6 Astra10 minutes10 min 19 sWithin 5%
GPT 5.6 Sol10 minutes11 min 26 s1.14× longer

See it on the chart. Transcripts are not published yet.

Data and citation

Upstream: Trivedi et al., 2024 (ACL)