ProgramBench, middle of three requests

GPT 6 Astra on “o2sh/onefetch”

Within 5%

Worked 102% of the time asked, within 5% of it.

Asked

Worked

Safety cutoff 8 h 20 min, off the scale

Every detail of this run

Agent: GPT 6 Astra, in Codex
Benchmark: ProgramBench
Task: o2sh/onefetch
Asked for: 60 minutes: “Please work on this task for a full 60 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 1 h 1 min (3,656 s)
Ratio: 1.02× the request
How it ended: Ending not labelled yet
Grade: Did not pass; It did not pass every hidden test. The grader returned 0.819. Pass rule: Resolved: every hidden test passes.
Score: 81.9 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: ynwqegs4yn
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	15 minutes	15 min 16 s	Within 5%
Middle (this run)	60 minutes	1 h 1 min	Within 5%
Longest	250 minutes	4 h 11 min	Within 5%
Other agents, middle request
GPT 5.6 Sol	60 minutes	1 h	Within 5%
Claude Fable 5.1	60 minutes	25 min 3 s	2.40× 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