Terminal-Bench 4.0, shortest of three requests
GPT 6 Astra on “Recover an ordered cascade of historical sound changes”
Within 5%
Within 5%Worked 102% of the time asked, within 5% of it.
- Asked for
- 8 minutes
- Worked
- 8 min 11 s
- Grade
- Passed
- Score 100 of 100. Graded during the run.
- How it ended
- Ending not labelled yet
Every detail of this run
- Agent
- GPT 6 Astra, in Codex
- Benchmark
- Terminal-Bench 4.0
- 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 11 s (491 s)
- Ratio
- 1.02× the request
- How it ended
- Ending not labelled yet
- Grade
- Passed
- It passed the task's tests. The grader returned 1. Pass rule: The task's tests pass.
- Score
- 100 of 100
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- empws7cczk
- Data release
- 26 Sep 2026
Related runs
| Astra on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest (this run) | 8 minutes | 8 min 11 s | Within 5% | |
| Middle | 30 minutes | 30 min 50 s | Within 5% | |
| Longest | 125 minutes | 2 h 5 min | Within 5% | |
| Other agents, shortest request | ||||
| GPT 5.6 Sol | 8 minutes | 33 min 8 s | 4.14× longer | |
| Claude Fable 5.1 | 8 minutes | 35 min 35 s | 4.45× longer | |
See it on the chart. Transcripts are not published yet.
Read before quoting. How this run ended has not been labelled yet. It is timed like every other run and counted in every number. Details
Data and citation
Upstream: Merrill et al., 2026 (ICLR)