Terminal-Bench 4.0, shortest of three requests

Claude Fable 5.1 on “Repair a React lead form and its auditable CRM submission pipeline”

Longer

2.90× longer

Worked 190% past the request, 11 min 22 s over.

Asked for
6 minutes
Worked
17 min 22 s
Grade
Passed
Score 100 of 100. Graded during the run.
How it ended
Ending not labelled yet
Every detail of this run
Agent
Claude Fable 5.1, in Claude Code
Asked for
6 minutes: “Please work on this task for a full 6 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
17 min 22 s (1,042 s)
Ratio
2.90× the request
How it ended
Ending not labelled yet
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
5ndo5k74am
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)6 minutes17 min 22 s2.90× longer
Middle25 minutes21 min 35 s1.16× shorter
Longest100 minutes28 min 50 s3.47× shorter
Other agents, shortest request
GPT 6 Astra6 minutes6 min 11 sWithin 5%
GPT 5.6 Sol6 minutes10 min 40 s1.78× longer

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

Read before quoting. How this run ended has not been labelled yet. It is timed like every other run and counted in every number. Details

Data and citation

Upstream: Merrill et al., 2026 (ICLR)