GPQA Diamond, longest of three requests
Claude Fable 5.1 on “GPQA Diamond closed-book question 1 (Chemistry)”
Longer
1.11× longerWorked 11% past the request, 2 min 11 s over.
- Asked for
- 20 minutes
- Worked
- 22 min 11 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
- 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
- 22 min 11 s (1,331 s)
- Ratio
- 1.11× 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
- c47odqbz4j
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 1.25 minutes | 2 min 40 s | 2.13× longer | |
| Middle | 5 minutes | 6 min 58 s | 1.39× longer | |
| Longest (this run) | 20 minutes | 22 min 11 s | 1.11× longer | |
| Other agents, longest request | ||||
| GPT 6 Astra | 20 minutes | 20 min 9 s | Within 5% | |
| GPT 5.6 Sol | 20 minutes | 20 min 22 s | Within 5% | |
| Muse Spark 1.3 | 20 minutes | 2 min 25 s | 8.30× shorter | |
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Data and citation
Upstream: Rein et al., 2024 (COLM)