CORE-Bench v1.1, longest of three requests

GPT 5.6 Sol on “Reproduce journal and university ranking figures”

Within 5%

Within 5%

Worked 101% of the time asked, within 5% of it.

Asked for
100 minutes
Worked
1 h 41 min
Grade
Did not pass
Score 0 of 100. Graded during the run.
How it ended
Ended on its own
Every detail of this run
Agent
GPT 5.6 Sol, in Codex
Asked for
100 minutes: “Please work on this task for a full 100 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
1 h 41 min (6,052 s)
Ratio
1.01× 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
zqr3j6j6h7
Data release
26 Sep 2026
The other requests for GPT 5.6 Sol on this task, and the other agents at this request
Sol on this taskAskedWorkedSplitResult
Shortest6 minutes15 min 43 s2.62× longer
Middle25 minutes25 min 19 sWithin 5%
Longest (this run)100 minutes1 h 41 minWithin 5%
Other agents, longest request
GPT 6 Astra100 minutes1 h 41 minWithin 5%
Claude Fable 5.1100 minutes24 min 7 s4.15× shorter

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Data and citation

Upstream: Nadgir et al., 2026