GPQA Diamond, longest of three requests
Claude Fable 5.1 on “GPQA Diamond closed-book question 15 (Physics)”
Shorter
42.86× shorterStopped at 2% of the time asked, 19 min 32 s short.
- Asked for
- 20 minutes
- Worked
- 28 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
- 28 s (28 s)
- Ratio
- 0.02× 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
- tkngfzrcew
- Data release
- 26 Sep 2026
Related runs
| Fable on this task | Asked | Worked | Split | Result |
|---|---|---|---|---|
| Shortest | 1.25 minutes | 1 min 30 s | 1.20× longer | |
| Middle | 5 minutes | 51 s | 5.93× shorter | |
| Longest (this run) | 20 minutes | 28 s | 42.86× shorter | |
| Other agents, longest request | ||||
| GPT 6 Astra | 20 minutes | 20 min 20 s | Within 5% | |
| GPT 5.6 Sol | 20 minutes | 20 min 30 s | Within 5% | |
| Muse Spark 1.3 | 20 minutes | 23 s | 52.40× shorter | |
See it on the chart. Transcripts are not published yet.
Data and citation
Upstream: Rein et al., 2024 (COLM)