GPQA Diamond, longest of three requests
Claude Fable 5.1 on “GPQA Diamond closed-book question 6 (Chemistry)”
Shorter
3.02× shorterStopped at 33% of the time asked, 13 min 23 s short.
- Asked for
- 20 minutes
- Worked
- 6 min 37 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
- 6 min 37 s (397 s)
- Ratio
- 0.33× 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
- 73c5xe36rx
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 1.25 minutes | 1 min 43 s | 1.38× longer | |
| Middle | 5 minutes | 9 min 50 s | 1.97× longer | |
| Longest (this run) | 20 minutes | 6 min 37 s | 3.02× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 20 minutes | 20 min 15 s | Within 5% | |
| GPT 5.6 Sol | 20 minutes | 20 min 8 s | Within 5% | |
| Muse Spark 1.3 | 20 minutes | 3 min 32 s | 5.65× shorter | |
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Data and citation
Upstream: Rein et al., 2024 (COLM)