Drex v1.5
olderNace.AI · nace-ai/drex-v1.5 · added 20 Oct 2026
Newest version: Drex v2.0. Ranks on this page count every version, older ones included.
Drex v1.5 by Nace.AI, an older version of Drex v2.0, ranks #12 of 19 AI decision models on the DecisionBench Sudoku benchmark (logical reasoning), with accuracy 77.6%. View on OpenRouter.
- Sudoku rank
- #12 of 19
- Accuracy
- 77.6%
- Solved
- 20/20
- Mistakes / puzzle
- 14.5
- Solve time / puzzle
- 25s
- Cost / puzzle
- $0.003296
By difficulty
| Difficulty | Rank | Accuracy | Solved | Mistakes | Solve time | Cost |
|---|---|---|---|---|---|---|
| Easy | #13 | 87.2% | 5/5 | 6.0 | 16s | $0.001725 |
| Medium | #12 | 80.6% | 5/5 | 11.8 | 25s | $0.002900 |
| Hard | #13 | 75.8% | 5/5 | 17.2 | 28s | $0.003800 |
| Expert | #14 | 71.3% | 5/5 | 23.0 | 33s | $0.004758 |
Every race
| Puzzle | Mistakes | Calls | Solve time | Cost | Status |
|---|---|---|---|---|---|
| easy-01 | 6 | 18 | 18s | $0.001757 | Solved |
| easy-02 | 6 | 17 | 18s | $0.001696 | Solved |
| easy-03 | 4 | 17 | 16s | $0.001618 | Solved |
| easy-04 | 8 | 19 | 16s | $0.001916 | Solved |
| easy-05 | 6 | 18 | 12s | $0.001641 | Solved |
| medium-01 | 8 | 23 | 15s | $0.002465 | Solved |
| medium-02 | 11 | 25 | 23s | $0.002799 | Solved |
| medium-03 | 12 | 25 | 26s | $0.002932 | Solved |
| medium-04 | 18 | 31 | 35s | $0.003786 | Solved |
| medium-05 | 10 | 23 | 27s | $0.002519 | Solved |
| hard-01 | 20 | 34 | 36s | $0.004350 | Solved |
| hard-02 | 11 | 25 | 24s | $0.002952 | Solved |
| hard-03 | 21 | 36 | 32s | $0.004264 | Solved |
| hard-04 | 15 | 30 | 19s | $0.003608 | Solved |
| hard-05 | 19 | 32 | 29s | $0.003825 | Solved |
| expert-01 | 24 | 39 | 38s | $0.005068 | Solved |
| expert-02 | 14 | 29 | 19s | $0.003477 | Solved |
| expert-03 | 22 | 35 | 26s | $0.004304 | Solved |
| expert-04 | 19 | 34 | 36s | $0.004211 | Solved |
| expert-05 | 36 | 50 | 44s | $0.006730 | Solved |