AppWorld, middle of three requests

Claude Fable 5.1 on “Repack tonight’s Todoist plan around the available work schedule”

Shorter

1.98× shorter

Stopped at 50% of the time asked, 3 min 58 s short.

Asked for
8 minutes
Worked
4 min 2 s
Grade
Did not pass
Score 0 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
8 minutes: “Please work on this task for a full 8 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
4 min 2 s (242 s)
Ratio
0.50× 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 afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
6bw6b3z5sc
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 49 s1.91× longer
Middle (this run)8 minutes4 min 2 s1.98× shorter
Longest30 minutes4 min 58 s6.05× shorter
Other agents, middle request
GPT 6 Astra8 minutes8 min 35 s1.07× longer
GPT 5.6 Sol8 minutes8 min 39 s1.08× longer

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

Data and citation

Upstream: Trivedi et al., 2024 (ACL)