ProgramBench, longest of three requests

GPT 6 Astra on “rcoh/angle-grinder”

Within 5%

Within 5%

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

Asked for
250 minutes
Worked
4 h 10 min
Grade
Did not pass
Score 63.3 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
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 (15,019 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 0.633. Pass rule: Resolved: every hidden test passes.
Score
63.3 of 100
Graded afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
bl7mxi7qsi
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
Shortest15 minutes15 min 15 sWithin 5%
Middle60 minutes1 h 1 minWithin 5%
Longest (this run)250 minutes4 h 10 minWithin 5%
Other agents, longest request
GPT 5.6 Sol250 minutes4 h 11 minWithin 5%
Claude Fable 5.1250 minutes15 s980.39× shorter

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Data and citation

Upstream: Yang et al., 2026