Span-02
Respan · respan/span-02 · added 20 Oct 2026
Span-02 by Respan ranks #1 of 17 AI decision models on the DecisionBench Sudoku benchmark (logical reasoning), with accuracy 86.2%. View on OpenRouter.
- Sudoku rank
- #1 of 17
- Accuracy
- 86.2%
- Solved
- 20/20
- Mistakes / puzzle
- 8.1
- Solve time / puzzle
- 50s
- Cost / puzzle
- $0.003575
By difficulty
| Difficulty | Rank | Accuracy | Solved | Mistakes | Solve time | Cost |
|---|---|---|---|---|---|---|
| Easy | #1 | 94.5% | 5/5 | 2.4 | 34s | $0.001857 |
| Medium | #1 | 87.8% | 5/5 | 6.8 | 44s | $0.003097 |
| Hard | #2 | 83.1% | 5/5 | 11.0 | 57s | $0.004332 |
| Expert | #1 | 82.7% | 5/5 | 12.0 | 64s | $0.005013 |
Every race
| Puzzle | Mistakes | Calls | Solve time | Cost | Status |
|---|---|---|---|---|---|
| easy-01 | 1 | 15 | 34s | $0.001885 | Solved |
| easy-02 | 2 | 15 | 34s | $0.001696 | Solved |
| easy-03 | 5 | 17 | 37s | $0.002111 | Solved |
| easy-04 | 1 | 14 | 30s | $0.001690 | Solved |
| easy-05 | 3 | 16 | 33s | $0.001901 | Solved |
| medium-01 | 9 | 22 | 49s | $0.003447 | Solved |
| medium-02 | 8 | 21 | 42s | $0.003263 | Solved |
| medium-03 | 4 | 18 | 40s | $0.002449 | Solved |
| medium-04 | 7 | 21 | 46s | $0.003170 | Solved |
| medium-05 | 6 | 20 | 42s | $0.003155 | Solved |
| hard-01 | 7 | 23 | 51s | $0.003615 | Solved |
| hard-02 | 12 | 25 | 56s | $0.004142 | Solved |
| hard-03 | 17 | 32 | 71s | $0.005928 | Solved |
| hard-04 | 7 | 23 | 51s | $0.003620 | Solved |
| hard-05 | 12 | 26 | 58s | $0.004358 | Solved |
| expert-01 | 15 | 31 | 71s | $0.005607 | Solved |
| expert-02 | 11 | 27 | 58s | $0.004408 | Solved |
| expert-03 | 13 | 30 | 67s | $0.005132 | Solved |
| expert-04 | 10 | 27 | 59s | $0.004836 | Solved |
| expert-05 | 11 | 28 | 63s | $0.005082 | Solved |