ProgramBench, middle of three requests

Claude Fable 5.1 on “noborus/trdsql”

Shorter

147.06× shorter

Stopped at 1% of the time asked, 49 min 40 s short.

Asked

Worked

Safety cutoff 6 h 40 min, off the scale

Asked for: 50 minutes
Worked: 20 s
Grade: No grade recorded; This run is outside the paper's scores, and the campaign recorded no grade for it. Not in the paper's scores.
How it ended: Refused within 30 seconds

Every detail of this run

Agent: Claude Fable 5.1, in Claude Code
Benchmark: ProgramBench
Task: noborus/trdsql
Asked for: 50 minutes: “Please work on this task for a full 50 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 20 s (20 s)
Ratio: 0.01× the request
How it ended: Refused within 30 seconds
Grade: No grade recorded; This run is outside the paper's scores, and the campaign recorded no grade for it.
Wording: The standard sentence, used from 4 September 2026.
Run id: ismnh6o6wm
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 task	Asked	Worked	Result
Shortest	12.5 minutes	7 min 36 s	1.64× shorter
Middle (this run)	50 minutes	20 s	147.06× shorter
Longest	200 minutes	1 h 40 min	2.00× shorter
Other agents, middle request
GPT 6 Astra	50 minutes	50 min 38 s	Within 5%
GPT 5.6 Sol	50 minutes	50 min 30 s	Within 5%

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Data and citation