ProgramBench, shortest of three requests

GPT 6 Astra on “lfos/calcurse”

Within 5%

Worked 101% of the time asked, within 5% of it.

Asked

Worked

Safety cutoff 13 h 20 min, off the scale

Every detail of this run

Agent: GPT 6 Astra, in Codex
Benchmark: ProgramBench
Task: lfos/calcurse
Asked for: 25 minutes: “Please work on this task for a full 25 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 25 min 14 s (1,514 s)
Ratio: 1.01× the request
How it ended: Ending not labelled yet
Grade: Did not pass; It did not pass every hidden test. The grader returned 0.77. Pass rule: Resolved: every hidden test passes.
Score: 77 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: rhb6qf5b6g
Data release: 26 Sep 2026

The other requests for GPT 6 Astra on this task, and the other agents at this request
Astra on this task	Asked	Worked	Result
Shortest (this run)	25 minutes	25 min 14 s	Within 5%
Middle	100 minutes	1 h 40 min	Within 5%
Longest	400 minutes	6 h 41 min	Within 5%
Other agents, shortest request
GPT 5.6 Sol	25 minutes	23 min 42 s	1.05× shorter
Claude Fable 5.1	25 minutes	8 min 41 s	2.88× shorter

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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