Decision model
Open-Jev 27B v1.1
1 question per request
55.7% of the 2,198 questions right (53.6% to 57.8%, 95% interval). Back to the leaderboard.
How we called it
- Kind
- Decision model
- Access
- Open-Jev server, self-hosted
- Paid as
- Our own hardware
- Model ID
open-jev-27b-v1.1- Parameters
- 27.8B
- Hardware
- 1 × RTX PRO 6000 Blackwell (96 GB); BF16
- Note
- Fine-tune of Qwen3.8-27B (LoRA and a scoring head)
- Confidence from
- Option score
- Run
- 45, 4 October 2026
Settings
- Reasoning
- off
- Request format
- 1 question per request
- Requests at once
- 1
- Temperature
- not recorded
- Harness seed
- 0
- Harness commit
- not recorded
- Prompt version
- not recorded
Results
| Questions | Accuracy | 95% interval | Right |
|---|---|---|---|
| All questions | 55.7% | 53.6% to 57.8% | 1,224 of 2,198 |
| Reading | 82.9% | 79.9% to 85.6% | 544 of 656 |
| Grammar | 44.1% | 41.6% to 46.6% | 680 of 1,542 |
Comparison group: ABC. Compare with another setup.
Accuracy by topic
Confidence
- Answers kept at 99% or more
- 0, of which 0 wrong; 2,198 skipped, the model less than 99% sure
- Calibration gap
- 24.5 points
- AUROC, all questions
- 0.82 0.81 to 0.84
- AUROC, reading
- 0.89 0.86 to 0.92
- AUROC, grammar
- 0.75 0.72 to 0.77
- Brier score
- 0.265
- Accuracy of its surest answers
- most confident fifth: 97.3% right; most confident half: 80.0% right; most confident four fifths: 64.0% right
- Typical score of a right answer
- 33.2%
- Typical score of a wrong answer
- 24.2%
Repeats
Run 5 times on all questions.
- Answers changed in 5 runs
- 0 of 2,198
- Same wrong answer in all 5
- 974 of 2,198
- Wrong in at least one run
- 974 of 2,198
- Accuracy in each run
- 55.7%, 55.7%, 55.7%, 55.7%, 55.7%
Latency
- Latency, median request
- 0.386 s (its repeated runs)
- Latency, 90th percentile
- 0.573 s
- Requests at once
- 1
- Throughput
- 153.4 questions per minute of request time
- Request time
- 14.4 minutes, over the requests whose answers were kept
Latency: the time from sending one request to receiving its answer, measured from our computer, network and any retries within the request included. Request time: the time at least one request was in flight, over the requests whose answers were kept. It is not the run's elapsed time: it leaves out requests that failed and any pause before a run was resumed.
Cost
- $ per 1,000 questions
- Not measured
- Basis
- No dollar estimate; see hardware and time
- Input tokens per question
- 1,377
- Output tokens per question
- 0
Going first in front of an LLM
Replay of recorded answers, cutoff chosen on half the questions, averaged over the splits. Savings are estimates from API prices; the Method page explains how.
| LLM behind it | Share taken | Accuracy change | Saving |
|---|---|---|---|
| Gemini 3.8 Flashhigh reasoning · 16 questions per request | 13.2% | −0.08 points | 13%† |
| GPT-6 Astrahigh reasoning · 16 questions per request | 12.4% | −0.09 points | 12%† |
| GPT-6.1 Solhigh reasoning · 16 questions per request | 12.4% | −0.09 points | 12%† |
| GPT-6 Astralow reasoning · 16 questions per request | 12.4% | −0.09 points | 12%† |
| GPT-6 Astralow reasoning · 1 question per request | 12.4% | −0.09 points | 12%† |
| Gemini 3.8 Flashlow reasoning · 1 question per request | 15.2% | −0.13 points | 15%† |
| GPT-6.1 Sollow reasoning · 1 question per request | 13.5% | −0.12 points | 14%† |
| GPT-6.1 Sollow reasoning · 16 questions per request | 12.4% | −0.09 points | 12%† |
| Claude Opus 5.5high reasoning · 16 questions per request | 12.7% | −0.11 points | 13%† |
| GPT-6.1 Terrahigh reasoning · 16 questions per request | 12.4% | −0.09 points | 12%† |
| Claude Opus 5.5low reasoning · 1 question per request | 14.0% | −0.16 points | 14%† |
| Gemini 3.8 Flashlow reasoning · 16 questions per request | 14.7% | −0.12 points | 15%† |
| GPT-6.1 Terralow reasoning · 16 questions per request | 14.6% | −0.17 points | 15%† |
| Claude Opus 5.5low reasoning · 16 questions per request | 13.5% | −0.15 points | 13%† |
| Claude Sonnet 5.5high reasoning · 1 question per request | 18.1% | −0.21 points | 18%† |
| Claude Sonnet 5.5high reasoning · 16 questions per request | 27.3% | −0.15 points | 27%† |
† Leaves out the first model’s hardware cost, which we have not estimated.