Clef Flash
Cloudflare · cloudflare/clef-flash · added 20 Oct 2026
Clef Flash by Cloudflare ranks #5 of 12 AI decision models on the DecisionBench Sudoku benchmark (logical reasoning), with accuracy 80.4%. View on OpenRouter.
- Sudoku rank
- #5 of 12
- Accuracy
- 80.4%
- Solved
- 20/20
- Mistakes / puzzle
- 12.3
- Solve time / puzzle
- 20s
- Cost / puzzle
- $0.004933
By difficulty
| Difficulty | Rank | Accuracy | Solved | Mistakes | Solve time | Cost |
|---|---|---|---|---|---|---|
| Easy | #9 | 87.6% | 5/5 | 5.8 | 11s | $0.002769 |
| Medium | #5 | 82.5% | 5/5 | 10.4 | 23s | $0.004555 |
| Hard | #4 | 78.5% | 5/5 | 14.8 | 22s | $0.005804 |
| Expert | #4 | 76.1% | 5/5 | 18.0 | 25s | $0.006603 |
Every race
| Puzzle | Mistakes | Calls | Solve time | Cost | Status |
|---|---|---|---|---|---|
| easy-01 | 4 | 16 | 7.4s | $0.002025 | Solved |
| easy-02 | 6 | 18 | 12s | $0.002948 | Solved |
| easy-03 | 5 | 17 | 9.8s | $0.002677 | Solved |
| easy-04 | 4 | 18 | 13s | $0.002765 | Solved |
| easy-05 | 10 | 21 | 13s | $0.003432 | Solved |
| medium-01 | 5 | 20 | 11s | $0.002929 | Solved |
| medium-02 | 12 | 26 | 20s | $0.004720 | Solved |
| medium-03 | 11 | 24 | 27s | $0.004627 | Solved |
| medium-04 | 13 | 26 | 34s | $0.005413 | Solved |
| medium-05 | 11 | 27 | 24s | $0.005087 | Solved |
| hard-01 | 15 | 31 | 29s | $0.006458 | Solved |
| hard-02 | 18 | 33 | 19s | $0.006001 | Solved |
| hard-03 | 13 | 28 | 21s | $0.005346 | Solved |
| hard-04 | 14 | 29 | 22s | $0.005803 | Solved |
| hard-05 | 14 | 29 | 19s | $0.005413 | Solved |
| expert-01 | 18 | 34 | 27s | $0.007400 | Solved |
| expert-02 | 15 | 32 | 26s | $0.006434 | Solved |
| expert-03 | 23 | 39 | 30s | $0.007312 | Solved |
| expert-04 | 16 | 30 | 22s | $0.005642 | Solved |
| expert-05 | 18 | 34 | 21s | $0.006226 | Solved |