Agents' Last Exam, middle of three requests
GPT 6 Astra on “Build a reusable HST ACS/WFC visit-reduction pipeline”
Within 5%
Within 5%Worked 101% of the time asked, within 5% of it.
- Asked for
- 20 minutes
- Worked
- 20 min 10 s
- Grade
- Did not pass
- Score 90.5 of 100. Graded afterwards.
- How it ended
- Ended on its own
Every detail of this run
- Agent
- GPT 6 Astra, in Codex
- Benchmark
- Agents' Last Exam
- Asked for
- 20 minutes: “Please work on this task for a full 20 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 20 min 10 s (1,210 s)
- Ratio
- 1.01× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not pass the task's checker in full. The grader returned 0.905. Pass rule: Full pass: a checker score of 1.
- Score
- 90.5 of 100
- Graded afterwards. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- mqyqtvqjyd
- Data release
- 26 Sep 2026
Related runs
| Astra on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 5 minutes | 8 min 19 s | 1.66× longer | |
| Middle (this run) | 20 minutes | 20 min 10 s | Within 5% | |
| Longest | 80 minutes | 1 h 20 min | Within 5% | |
| Other agents, middle request | ||||
| GPT 5.6 Sol | 20 minutes | 20 min 19 s | Within 5% | |
| Claude Fable 5.1 | 20 minutes | 18 min 8 s | 1.10× shorter | |
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Data and citation
Upstream: Sun et al., 2026