Humanity's Last Exam, shortest of three requests

GPT 5.6 Sol on “Humanity's Last Exam item 24”

Longer

1.31× longer

Worked 31% past the request, 23 s over.

Asked

Worked

Safety cutoff 40 min, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: Humanity's Last Exam
Task: Humanity's Last Exam item 24
Asked for: 1.25 minutes: “Please work on this task for a full 1.25 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 1 min 38 s (98 s)
Ratio: 1.31× the request
How it ended: Ended on its own
Grade: Passed; It was marked correct by the judge. The grader returned 1. Pass rule: The benchmark's own judge marks the answer correct.
Score: 100 of 100; Graded during the run. The paper's value.
Clock tool: The agent could call a clock tool to check the requested time.
Wording: The standard sentence, used from 4 September 2026.
Run id: ykvobsviwy
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 task	Asked	Worked	Result
Shortest (this run)	1.25 minutes	1 min 38 s	1.31× longer
Middle	5 minutes	5 min 20 s	1.07× longer
Longest	20 minutes	20 min 10 s	Within 5%
Other agents, shortest request
GPT 6 Astra	1.25 minutes	1 min 24 s	1.12× longer
Claude Fable 5.1	1.25 minutes	17 min 22 s	13.89× longer

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