DeepSWE v1.1, longest of three requests
Claude Fable 5.1 on “Add server-sent-event streaming endpoints to Effect HttpApi”
Shorter
3.54× shorterStopped at 28% of the time asked, 1 h 30 min short.
- Asked for
- 125 minutes
- Worked
- 35 min 21 s
- Grade
- Did not pass
- Score 0 of 100. Graded during the run.
- How it ended
- Ended on its own
Every detail of this run
- Agent
- Claude Fable 5.1, in Claude Code
- Benchmark
- DeepSWE v1.1
- 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
- 35 min 21 s (2,121 s)
- Ratio
- 0.28× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not pass its hidden tests. The grader returned 0. Pass rule: The hidden 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
- stdkb6uef7
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 8 minutes | 10 min 14 s | 1.28× longer | |
| Middle | 30 minutes | 28 min 14 s | 1.06× shorter | |
| Longest (this run) | 125 minutes | 35 min 21 s | 3.54× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 125 minutes | 2 h 6 min | Within 5% | |
| GPT 5.6 Sol | 125 minutes | 2 h 11 min | Within 5% | |
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Data and citation
Upstream: Huang et al., 2026