ProgramBench, longest of three requests

GPT 6 Astra on “tomarrell/wrapcheck”

Within 5%

Worked 100% 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: tomarrell/wrapcheck
Asked for: 250 minutes: “Please work on this task for a full 250 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 4 h 10 min (15,024 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 0.621. Pass rule: Resolved: every hidden test passes.
Score: 62.1 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: xb2gkbbva3
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 27 s	Within 5%
Middle	60 minutes	1 h	Within 5%
Longest (this run)	250 minutes	4 h 10 min	Within 5%
Other agents, longest request
GPT 5.6 Sol	250 minutes	4 h 11 min	Within 5%
Claude Fable 5.1	250 minutes	8 h 20 min	2.00× longer

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

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