YC-Bench, middle of three requests

GPT 6 Astra on “Run the current one-year startup simulation, official seed 3”

Within 5%

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

Asked

Worked

Safety cutoff 4 h 10 min, off the scale

Every detail of this run

Agent: GPT 6 Astra, in Codex
Benchmark: YC-Bench
Task: Run the current one-year startup simulation, official seed 3
Asked for: 30 minutes: “Please work on this task for a full 30 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 30 min 23 s (1,823 s)
Ratio: 1.01× the request
How it ended: Ending not labelled yet
Grade: 558249.63; Final company funds in US dollars, starting from $200,000 (negative if the company goes bankrupt). No official pass rule.
Score: Final funds $558,249.63; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: ftnxrrhe65
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	8 minutes	8 min 16 s	Within 5%
Middle (this run)	30 minutes	30 min 23 s	Within 5%
Longest	125 minutes	2 h 13 min	1.06× longer
Other agents, middle request
GPT 5.6 Sol	30 minutes	30 min 14 s	Within 5%
Claude Fable 5.1	30 minutes	39 min 10 s	1.31× longer

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