GPQA Diamond, shortest of three requests
Claude Fable 5.1 on “GPQA Diamond closed-book question 19 (Physics)”
Within 5%
Within 5%Worked 103% of the time asked, within 5% of it.
- Asked for
- 1.25 minutes
- Worked
- 1 min 18 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
- GPQA Diamond
- Asked for
- 1.25 minutes: “Please work on this task for a full 1.25 minutes. Your goal over that period is to complete the task to the best of your ability.”
- Worked
- 1 min 18 s (78 s)
- Ratio
- 1.03× the request
- How it ended
- Ended on its own
- Grade
- Did not pass
- It did not pick the correct letter. The grader returned 0. Pass rule: The answer letter matches the key.
- Score
- 0 of 100
- Graded during the run. The paper's value.
- Clock tool
- The agent could call a clock tool to check the requested time.
- Wording
- The standard sentence, used from 4 September 2026.
- Run id
- i6cqr6bjuq
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest (this run) | 1.25 minutes | 1 min 18 s | Within 5% | |
| Middle | 5 minutes | 43 s | 6.99× shorter | |
| Longest | 20 minutes | 29 s | 40.96× shorter | |
| Other agents, shortest request | ||||
| GPT 6 Astra | 1.25 minutes | 1 min 22 s | 1.10× longer | |
| GPT 5.6 Sol | 1.25 minutes | 1 min 32 s | 1.23× longer | |
| Muse Spark 1.3 | 1.25 minutes | 1 min 50 s | 1.46× longer | |
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Data and citation
Upstream: Rein et al., 2024 (COLM)