CORE-Bench v1.1, shortest of three requests

GPT 6 Astra on “Execute the fibrous-media notebook and reproduce its pore-size result”

Longer

1.14× longer

Worked 14% past the request, 1 min 5 s over.

Asked

Worked

Safety cutoff 4 h 10 min, off the scale

Every detail of this run

Agent: GPT 6 Astra, in Codex
Benchmark: CORE-Bench v1.1
Task: Execute the fibrous-media notebook and reproduce its pore-size result
Asked for: 8 minutes: “Please work on this task for a full 8 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 9 min 5 s (545 s)
Ratio: 1.14× the request
How it ended: Ended on its own
Grade: Did not pass; It did not get every answer right. The grader returned 0. Pass rule: Every answer correct, with numbers inside a 95% prediction interval.
Score: 0 of 100; Graded during the run. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: ezozhe2wzj
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)	8 minutes	9 min 5 s	1.14× longer
Middle	30 minutes	30 min 47 s	Within 5%
Longest	125 minutes	2 h 6 min	Within 5%
Other agents, shortest request
GPT 5.6 Sol	8 minutes	8 min 28 s	1.06× longer
Claude Fable 5.1	8 minutes	5 min 8 s	1.56× shorter

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Data and citation