Claude Haiku 5.5
Anthropic · released 2026-10-07 · route claude-haiku-5-5 · Model profile · Chess results
Results
- Score
- 3195%: 19 to 43
- Grids solved
- 13 of 42
- Blank cells filled correctly
- 93.1%
- Wrong cells / empty cells / changed a given / no grid
- 8 / 0 / 21 / 0
- Broke the rules (complete grid repeating a digit)
- 8
- Near misses (three cells or fewer wrong)
- 7
- Average stated confidence
- 96%
- Average confidence when it had not solved it
- 96%
- Sure but wrong (90% or more, unsolved)
- 29
- Calibration (Brier, lower is better)
- 0.643
- API-equivalent cost per grid
- $0.015
- API-equivalent cost per solved grid
- $0.049
- Seconds per grid
- 111
- Tokens per grid (in / out)
- 912 / 30,157
- Reasoning tokens per grid
- 30,053
- Retries for an unreadable reply
- 0
- Aborted on our side (not counted)
- 0
By tier
| Tier | Needs | Solved | Output tokens | Seconds |
|---|---|---|---|---|
| Cozy | Singles only | 3 of 6 | 15,853 | 60 |
| Gentle | Scanning | 1 of 6 | 22,690 | 83 |
| Steady | Locked candidates | 1 of 6 | 34,434 | 127 |
| Tricky | Hidden pairs and triples | 3 of 6 | 33,600 | 126 |
| Devious | Wings and fish | 2 of 6 | 20,784 | 77 |
| Expert | Deep wings and fish | 2 of 6 | 38,906 | 146 |
| Beyond | No human technique finishes it | 1 of 6 | 44,833 | 162 |
Cells by the technique they needed
Each blank cell is tagged with the simplest technique that fills it, given everything a solver could fill before it.
| Technique | Cells | Filled correctly |
|---|---|---|
| Last free cell | 432 | 96.3% |
| Scanning | 674 | 93.9% |
| Locked candidates | 274 | 93.1% |
| Hidden pairs and triples | 258 | 91.5% |
| Wings and fish | 165 | 92.1% |
| Deep wings and fish | 181 | 90.1% |
| Search | 249 | 90.0% |
Every answer
Cozy #1Solved 50 of 50 cells97% sure · 16,880 tokens · $0.0085Cozy #2Changed a given digit 45 of 48 cells97% sure · 12,834 tokens · $0.0066Cozy #3Solved 49 of 49 cells97% sure · 14,523 tokens · $0.0074Cozy #4Solved 50 of 50 cells97% sure · 22,664 tokens · $0.012Cozy #5Changed a given digit 47 of 49 cells96% sure · 14,485 tokens · $0.0074Cozy #6Changed a given digit 37 of 39 cells96% sure · 13,730 tokens · $0.0070Gentle #1Changed a given digit 50 of 56 cells97% sure · 24,768 tokens · $0.013Gentle #2Solved 51 of 51 cells97% sure · 19,228 tokens · $0.0098Gentle #3Wrong cells 50 of 52 cells97% sure · 17,928 tokens · $0.0091Gentle #4Wrong cells 49 of 51 cells96% sure · 19,744 tokens · $0.010Gentle #5Wrong cells 55 of 56 cells97% sure · 37,740 tokens · $0.019Gentle #6Changed a given digit 45 of 52 cells95% sure · 16,733 tokens · $0.0085Steady #1Wrong cells 47 of 53 cells96% sure · 47,932 tokens · $0.024Steady #2Changed a given digit 45 of 53 cells97% sure · 26,957 tokens · $0.014Steady #3Wrong cells 48 of 49 cells97% sure · 20,374 tokens · $0.010Steady #4Solved 54 of 54 cells96% sure · 40,368 tokens · $0.020Steady #5Changed a given digit 53 of 53 cells97% sure · 36,937 tokens · $0.019Steady #6Changed a given digit 45 of 54 cells97% sure · 34,036 tokens · $0.017Tricky #1Changed a given digit 42 of 55 cells96% sure · 34,408 tokens · $0.017Tricky #2Changed a given digit 51 of 57 cells97% sure · 45,939 tokens · $0.023Tricky #3Solved 57 of 57 cells96% sure · 40,672 tokens · $0.021Tricky #4Solved 54 of 54 cells97% sure · 27,394 tokens · $0.014Tricky #5Changed a given digit 46 of 55 cells97% sure · 18,264 tokens · $0.0093Tricky #6Solved 56 of 56 cells96% sure · 34,925 tokens · $0.018Devious #1Changed a given digit 48 of 55 cells96% sure · 20,177 tokens · $0.010Devious #2Changed a given digit 46 of 55 cells95% sure · 30,128 tokens · $0.015Devious #3Changed a given digit 44 of 49 cells96% sure · 20,278 tokens · $0.010Devious #4Solved 40 of 40 cells97% sure · 14,358 tokens · $0.0074Devious #5Solved 47 of 47 cells97% sure · 18,428 tokens · $0.0094Devious #6Wrong cells 52 of 54 cells97% sure · 21,335 tokens · $0.011Expert #1Changed a given digit 52 of 58 cells97% sure · 83,330 tokens · $0.042Expert #2Changed a given digit 36 of 53 cells97% sure · 19,760 tokens · $0.010Expert #3Changed a given digit 54 of 54 cells97% sure · 26,482 tokens · $0.013Expert #4Solved 57 of 57 cells97% sure · 43,745 tokens · $0.022Expert #5Changed a given digit 56 of 58 cells96% sure · 27,271 tokens · $0.014Expert #6Solved 54 of 54 cells96% sure · 32,847 tokens · $0.017Beyond #1Changed a given digit 52 of 60 cells97% sure · 51,581 tokens · $0.026Beyond #2Changed a given digit 48 of 57 cells95% sure · 44,178 tokens · $0.022Beyond #3Wrong cells 54 of 56 cells97% sure · 55,398 tokens · $0.028Beyond #4Wrong cells 55 of 57 cells96% sure · 37,645 tokens · $0.019Beyond #5Solved 59 of 59 cells96% sure · 38,412 tokens · $0.019Beyond #6Changed a given digit 49 of 57 cells96% sure · 41,784 tokens · $0.021