ProgramBench, longest of three requests

GPT 6 Astra on “lfos/calcurse”

Within 5%

Within 5%

Worked 100% of the time asked, within 5% of it.

Asked for
400 minutes
Worked
6 h 41 min
Grade
Did not pass
Score 79 of 100. Graded afterwards.
How it ended
Ended on its own
Every detail of this run
Agent
GPT 6 Astra, in Codex
Benchmark
ProgramBench
Asked for
400 minutes: “Please work on this task for a full 400 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
6 h 41 min (24,049 s)
Ratio
1.00× the request
How it ended
Ended on its own
Grade
Did not pass
It did not pass every hidden test. The grader returned 0.79. Pass rule: Resolved: every hidden test passes.
Score
79 of 100
Graded afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
ff45swophj
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 taskAskedWorkedSplitResult
Shortest25 minutes25 min 14 sWithin 5%
Middle100 minutes1 h 40 minWithin 5%
Longest (this run)400 minutes6 h 41 minWithin 5%
Other agents, longest request
GPT 5.6 Sol400 minutes13 min 54 s28.79× shorter
Claude Fable 5.1400 minutes5 h 23 min1.24× shorter

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

Data and citation

Upstream: Yang et al., 2026