Terminal-Bench 4.0, shortest of three requests

Claude Fable 5.1 on “Recalculate SA-CCR exposure, RWA, capital, and workbook evidence”

Longer

3.02× longer

Worked 202% past the request, 8 min 6 s over.

Asked for
4 minutes
Worked
12 min 6 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
Asked for
4 minutes: “Please work on this task for a full 4 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
12 min 6 s (726 s)
Ratio
3.02× the request
How it ended
Ended on its own
Grade
Passed
It passed the task's tests. The grader returned 1. Pass rule: The task's tests pass.
Score
100 of 100
Graded during the run. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
qaxbxpvcbw
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
Shortest (this run)4 minutes12 min 6 s3.02× longer
Middle15 minutes15 min 40 sWithin 5%
Longest60 minutes18 min 13 s3.29× shorter
Other agents, shortest request
GPT 6 Astra4 minutes8 min 22 s2.09× longer
GPT 5.6 Sol4 minutes21 min 46 s5.44× longer

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Data and citation

Upstream: Merrill et al., 2026 (ICLR)