YC-Bench, shortest of three requests
GPT 5.6 Sol on “Run the current one-year startup simulation, official seed 1”
Within 5%
Within 5%Worked 104% of the time asked, within 5% of it.
- Asked for
- 8 minutes
- Worked
- 8 min 17 s
- Grade
- Final funds $335,532.06
- Graded afterwards.
- How it ended
- Ended on its own
Every detail of this run
- Agent
- GPT 5.6 Sol, in Codex
- Benchmark
- YC-Bench
- 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
- 8 min 17 s (497 s)
- Ratio
- 1.04× the request
- How it ended
- Ended on its own
- Grade
- 335532.06
- Final company funds in US dollars, starting from $200,000 (negative if the company goes bankrupt). No official pass rule.
- Score
- Final funds $335,532.06
- Graded afterwards. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- iuzbwypztj
- Data release
- 26 Sep 2026
Related runs
| Sol on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest (this run) | 8 minutes | 8 min 17 s | Within 5% | |
| Middle | 30 minutes | 17 min 27 s | 1.72× shorter | |
| Longest | 125 minutes | 35 min 7 s | 3.56× shorter | |
| Other agents, shortest request | ||||
| GPT 6 Astra | 8 minutes | 9 min 6 s | 1.14× longer | |
| Claude Fable 5.1 | 8 minutes | 28 min 58 s | 3.62× longer | |
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Data and citation
Upstream: He et al., 2026