ProgramBench, longest of three requests

GPT 5.6 Sol on “kaushiksrini/parqeye”

Shorter

7.89× shorter

Stopped at 13% of the time asked, 7 h 17 min short.

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: 500 minutes: “Please work on this task for a full 500 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 1 h 3 min (3,800 s)
Ratio: 0.13× the request
How it ended: Stopped by an error
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: usvblpmigq
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	125 minutes	2 h 5 min	Within 5%
Longest (this run)	500 minutes	1 h 3 min	7.89× shorter
Other agents, longest request
GPT 6 Astra	500 minutes	8 h 21 min	Within 5%
Claude Fable 5.1	500 minutes	32 min 36 s	15.34× shorter

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

Read before quoting. This run was stopped by an error, so its time is a lower bound: the agent might have kept going. Details

Data and citation