GPQA Diamond, longest of three requests
Claude Fable 5.1 on “GPQA Diamond closed-book question 20 (Physics)”
Shorter
25.53× shorterStopped at 4% of the time asked, 19 min 13 s short.
- Asked for
- 20 minutes
- Worked
- 47 s
- Grade
- Passed
- Score 100 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
- 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
- 47 s (47 s)
- Ratio
- 0.04× the request
- How it ended
- Ended on its own
- Grade
- Passed
- It picked the correct letter. The grader returned 1. Pass rule: The answer letter matches the key.
- Score
- 100 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
- xjt4cgevhv
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 1.25 minutes | 1 min 31 s | 1.21× longer | |
| Middle | 5 minutes | 1 min 4 s | 4.72× shorter | |
| Longest (this run) | 20 minutes | 47 s | 25.53× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 20 minutes | 20 min 22 s | Within 5% | |
| GPT 5.6 Sol | 20 minutes | 20 min 25 s | Within 5% | |
| Muse Spark 1.3 | 20 minutes | 21 s | 56.07× shorter | |
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Data and citation
Upstream: Rein et al., 2024 (COLM)