ProgramBench, shortest of three requests

GPT 6 Astra on “luajit/luajit”

Within 5%

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

Asked

Worked

Safety cutoff 6 h 40 min, off the scale

Every detail of this run

Agent: GPT 6 Astra, in Codex
Benchmark: ProgramBench
Task: luajit/luajit
Asked for: 12.5 minutes: “Please work on this task for a full 12.5 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 12 min 41 s (761 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 0.84. Pass rule: Resolved: every hidden test passes.
Score: 84 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: mhpbxkd55a
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)	12.5 minutes	12 min 41 s	Within 5%
Middle	50 minutes	50 min 33 s	Within 5%
Longest	200 minutes	3 h 21 min	Within 5%
Other agents, shortest request
GPT 5.6 Sol	12.5 minutes	18 min 17 s	1.46× longer
Claude Fable 5.1	12.5 minutes	17 min 43 s	1.42× longer

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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