Drex v2.0
Nace.AI · nace-ai/drex-v2.0 · added 20 Oct 2026
Older version: Drex v1.5
Drex v2.0 by Nace.AI ranks #6 of 17 AI decision models on the DecisionBench Sudoku benchmark (logical reasoning), with accuracy 81.5%. View on OpenRouter.
- Sudoku rank
- #6 of 17
- Accuracy
- 81.5%
- Solved
- 20/20
- Mistakes / puzzle
- 11.4
- Solve time / puzzle
- 20s
- Cost / puzzle
- $0.005205
By difficulty
| Difficulty | Rank | Accuracy | Solved | Mistakes | Solve time | Cost |
|---|---|---|---|---|---|---|
| Easy | #3 | 91.5% | 5/5 | 3.8 | 13s | $0.002666 |
| Medium | #2 | 85.7% | 5/5 | 8.2 | 18s | $0.004341 |
| Hard | #7 | 79.2% | 5/5 | 14.2 | 25s | $0.006273 |
| Expert | #9 | 74.7% | 5/5 | 19.4 | 25s | $0.007540 |
Every race
| Puzzle | Mistakes | Calls | Solve time | Cost | Status |
|---|---|---|---|---|---|
| easy-01 | 5 | 18 | 17s | $0.003164 | Solved |
| easy-02 | 5 | 17 | 15s | $0.002849 | Solved |
| easy-03 | 2 | 15 | 10s | $0.002298 | Solved |
| easy-04 | 4 | 16 | 12s | $0.002503 | Solved |
| easy-05 | 3 | 15 | 11s | $0.002518 | Solved |
| medium-01 | 8 | 21 | 17s | $0.003867 | Solved |
| medium-02 | 11 | 24 | 22s | $0.004726 | Solved |
| medium-03 | 7 | 21 | 19s | $0.003922 | Solved |
| medium-04 | 8 | 23 | 18s | $0.004897 | Solved |
| medium-05 | 7 | 22 | 15s | $0.004294 | Solved |
| hard-01 | 14 | 29 | 28s | $0.006132 | Solved |
| hard-02 | 18 | 31 | 31s | $0.006984 | Solved |
| hard-03 | 5 | 21 | 17s | $0.004033 | Solved |
| hard-04 | 15 | 29 | 21s | $0.006563 | Solved |
| hard-05 | 19 | 34 | 29s | $0.007654 | Solved |
| expert-01 | 18 | 32 | 24s | $0.007214 | Solved |
| expert-02 | 17 | 32 | 28s | $0.007279 | Solved |
| expert-03 | 20 | 35 | 25s | $0.007703 | Solved |
| expert-04 | 19 | 32 | 23s | $0.007133 | Solved |
| expert-05 | 23 | 38 | 26s | $0.008372 | Solved |