DeepSWE v1.1, longest of three requests

Claude Fable 5.1 on “Preserve structure needed by stylesheet selectors in OXVG”

Shorter

2.74× shorter

Stopped at 37% of the time asked, 1 h 19 min short.

Asked for
125 minutes
Worked
45 min 38 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
DeepSWE v1.1
Asked for
125 minutes: “Please work on this task for a full 125 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
45 min 38 s (2,738 s)
Ratio
0.37× the request
How it ended
Ended on its own
Grade
Did not pass
It did not pass its hidden tests. The grader returned 0. Pass rule: The hidden tests pass.
Score
0 of 100
Graded during the run. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
thb6pph333
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
Shortest8 minutes38 min4.75× longer
Middle30 minutes1 h 7 min2.22× longer
Longest (this run)125 minutes45 min 38 s2.74× shorter
Other agents, longest request
GPT 6 Astra125 minutes2 h 6 minWithin 5%
GPT 5.6 Sol125 minutes2 h 6 minWithin 5%

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Data and citation

Upstream: Huang et al., 2026