Yatzi
Nordic Yatzy against a strong engine. Fifteen boxes, no American joker rules. The model chooses how to keep dice and what to score. We score every real decision against the engine oracle. The headline is how often that decision matches the oracle. See Methodology.
Quality is exact ideal %, 0–100. Protocol boardbench-0.1.
Quality vs cost
Horizontal axis is logarithmic. Lines join the same model at different efforts.
Table
| Model | Quality | Legality | Cost | n |
|---|---|---|---|---|
| Fable 5Medium | 83.3 | 100.0 | $1.59 | 1 × 42 |
| Sonnet 5Medium | 81.4 | 99.4 | $0.43 | 3 × 118 |
| Kimi K3Medium | 80.0 | 95.7 | $0.25 | 2 × 80 |
| Grok 4.6Medium | 77.8 | 100.0 | $0.14 | 2 × 81 |
| Opus 5Medium | 77.2 | 100.0 | $2.42 | 2 × 79 |
| Grok 4.5Medium | 77.2 | 98.9 | $0.09 | 3 × 127 |
| Grok 4.6High | 76.5 | 100.0 | $0.14 | 2 × 81 |
| SolMedium | 75.6 | 100.0 | $0.43 | 2 × 82 |
| LunaHigh | 73.5 | 100.0 | $0.02 | 2 × 83 |
| Grok 4.5Low | 72.1 | 98.3 | $0.09 | 1 × 43 |
Headline is exact ideal %. n is quality matches × scored decisions.