Terminal-Bench 4.0, longest of three requests
Claude Fable 5.1 on “Repair batched LLM evaluation so it matches single-example semantics”
Shorter
6.04× shorterStopped at 17% of the time asked, 1 h 44 min short.
- Asked for
- 125 minutes
- Worked
- 20 min 42 s
- Grade
- Did not pass
- Score 0 of 100. Graded during the run.
- 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
- 125 minutes: “Please work on this task for a full 125 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 20 min 42 s (1,242 s)
- Ratio
- 0.17× 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
- Graded during the run. The paper's value.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- 7m77pzajxg
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 8 minutes | 16 min 30 s | 2.06× longer | |
| Middle | 30 minutes | 18 min 18 s | 1.64× shorter | |
| Longest (this run) | 125 minutes | 20 min 42 s | 6.04× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 125 minutes | 2 h 5 min | Within 5% | |
| GPT 5.6 Sol | 125 minutes | 2 h 6 min | 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)