ProgramBench, middle of three requests

GPT 5.6 Sol on “kaushiksrini/parqeye”

Within 5%

Worked 100% of the time asked, within 5% of it.

Asked

Worked

Safety cutoff 16 h 40 min, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: ProgramBench
Task: kaushiksrini/parqeye
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: 2 h 5 min (7,520 s)
Ratio: 1.00× the request
How it ended: Ending not labelled yet
Grade: Did not pass; It did not pass every hidden test. The grader returned 0.666. Pass rule: Resolved: every hidden test passes.
Score: 66.6 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: osncat2gmt
Data release: 26 Sep 2026

The other requests for GPT 5.6 Sol on this task, and the other agents at this request
Sol on this task	Asked	Worked	Result
Shortest	30 minutes	16 h 40 min	33.33× longer
Middle (this run)	125 minutes	2 h 5 min	Within 5%
Longest	500 minutes	1 h 3 min	7.89× shorter
Other agents, middle request
GPT 6 Astra	125 minutes	2 h 6 min	Within 5%
Claude Fable 5.1	125 minutes	16 s	460.12× shorter

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Data and citation