PPTArena, longest of three requests

Claude Fable 5.1 on “Accessibility and master cleanup”

Shorter

2.52× shorter

Stopped at 40% of the time asked, 15 min 6 s short.

Asked for
25 minutes
Worked
9 min 55 s
Grade
Score 0 of 100
Instructions 0 of 5, visuals 0 of 5. Nothing to grade, counted as 0.
How it ended
Ended on its own
Every detail of this run
Agent
Claude Fable 5.1, in Claude Code
Benchmark
PPTArena
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
9 min 55 s (595 s)
Ratio
0.40× the request
How it ended
Ended on its own
Grade
Instructions 0.00 of 5, visuals 0.00 of 5
Two 0-to-5 judge scores, instruction following (IF) and visual quality (VQ), each the median of 3 judge samples. No official pass rule.
Score
0 of 100
Nothing to grade, counted as 0. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
v4aq6d4mhg
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 minutes8 min 37 s5.75× longer
Middle6 minutes12 min 31 s2.08× longer
Longest (this run)25 minutes9 min 55 s2.52× shorter
Other agents, longest request
GPT 6 Astra25 minutes25 min 29 sWithin 5%
GPT 5.6 Sol25 minutes24 min 39 sWithin 5%

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Data and citation