Terminal-Bench 4.0, shortest of three requests
Claude Fable 5.1 on “Generate physically valid walking, jumping, and running trajectories”
Longer
2.81× longerWorked 181% past the request, 36 min 9 s over.
- Asked for
- 20 minutes
- Worked
- 56 min 9 s
- Grade
- Did not pass
- Score 0 of 100. Nothing to grade, counted as 0.
- How it ended
- Stopped by an error
Every detail of this run
- Agent
- Claude Fable 5.1, in Claude Code
- Benchmark
- Terminal-Bench 4.0
- 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
- 56 min 9 s (3,369 s)
- Ratio
- 2.81× the request
- How it ended
- Stopped by an error
- Grade
- Did not pass
- It did not pass the task's tests. The grader returned 0. Pass rule: The task's tests pass.
- Score
- 0 of 100
- Nothing to grade, counted as 0. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- zcm3dnuke4
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest (this run) | 20 minutes | 56 min 9 s | 2.81× longer | |
| Middle | 80 minutes | 1 h 52 min | 1.40× longer | |
| Longest | 300 minutes | 3 h 6 min | 1.61× shorter | |
| Other agents, shortest request | ||||
| GPT 6 Astra | 20 minutes | 22 min 23 s | 1.12× longer | |
| GPT 5.6 Sol | 20 minutes | 20 min 25 s | Within 5% | |
See it on the chart. Transcripts are not published yet.
Read before quoting. This run was stopped by an error, so its time is a lower bound: the agent might have kept going. Details
Data and citation
Upstream: Merrill et al., 2026 (ICLR)