YC-Bench, shortest of three requests

GPT 5.6 Sol on “Run the current one-year startup simulation, official seed 3”

Longer

1.75× longer

Worked 75% past the request, 6 min 1 s over.

Asked

Worked

Safety cutoff 4 h 10 min, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: YC-Bench
Task: Run the current one-year startup simulation, official seed 3
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: 14 min 1 s (841 s)
Ratio: 1.75× the request
How it ended: Ended on its own
Grade: 701045.07; Final company funds in US dollars, starting from $200,000 (negative if the company goes bankrupt). No official pass rule.
Score: Final funds $701,045.07; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: jph7qctghe
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)	8 minutes	14 min 1 s	1.75× longer
Middle	30 minutes	30 min 14 s	Within 5%
Longest	125 minutes	1 h 1 min	2.06× shorter
Other agents, shortest request
GPT 6 Astra	8 minutes	8 min 16 s	Within 5%
Claude Fable 5.1	8 minutes	44 min 16 s	5.53× longer

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Data and citation