Claude Opus 5.5
Anthropic · released 2026-09-22 · route claude-opus-5-5 · Model profile · Chess results
Results
- Score
- 10095%: 91 to 100
- Grids solved
- 42 of 42
- Blank cells filled correctly
- 100.0%
- Wrong cells / empty cells / changed a given / no grid
- 0 / 0 / 0 / 0
- Broke the rules (complete grid repeating a digit)
- 0
- Near misses (three cells or fewer wrong)
- 0
- Average stated confidence
- 99%
- Average confidence when it had not solved it
- n/a
- Sure but wrong (90% or more, unsolved)
- 0
- Calibration (Brier, lower is better)
- 0.000
- API-equivalent cost per grid
- $0.244
- API-equivalent cost per solved grid
- $0.244
- Seconds per grid
- 101
- Tokens per grid (in / out)
- 910 / 11,827
- Reasoning tokens per grid
- 11,720
- Retries for an unreadable reply
- 0
- Aborted on our side (not counted)
- 0
By tier
| Tier | Needs | Solved | Output tokens | Seconds |
|---|---|---|---|---|
| Cozy | Singles only | 6 of 6 | 4,521 | 41 |
| Gentle | Scanning | 6 of 6 | 8,296 | 71 |
| Steady | Locked candidates | 6 of 6 | 12,067 | 102 |
| Tricky | Hidden pairs and triples | 6 of 6 | 16,782 | 143 |
| Devious | Wings and fish | 6 of 6 | 8,398 | 74 |
| Expert | Deep wings and fish | 6 of 6 | 11,761 | 102 |
| Beyond | No human technique finishes it | 6 of 6 | 20,962 | 174 |
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 | 100.0% |
| Scanning | 674 | 100.0% |
| Locked candidates | 274 | 100.0% |
| Hidden pairs and triples | 258 | 100.0% |
| Wings and fish | 165 | 100.0% |
| Deep wings and fish | 181 | 100.0% |
| Search | 249 | 100.0% |
Every answer
Cozy #1Solved 50 of 50 cells99% sure · 6,155 tokens · $0.130Cozy #2Solved 48 of 48 cells98% sure · 4,320 tokens · $0.094Cozy #3Solved 49 of 49 cells99% sure · 4,891 tokens · $0.105Cozy #4Solved 50 of 50 cells98% sure · 4,224 tokens · $0.092Cozy #5Solved 49 of 49 cells98% sure · 4,713 tokens · $0.102Cozy #6Solved 39 of 39 cells97% sure · 2,821 tokens · $0.064Gentle #1Solved 56 of 56 cells99% sure · 11,483 tokens · $0.237Gentle #2Solved 51 of 51 cells99% sure · 7,892 tokens · $0.165Gentle #3Solved 52 of 52 cells99% sure · 7,432 tokens · $0.156Gentle #4Solved 51 of 51 cells99% sure · 6,695 tokens · $0.141Gentle #5Solved 56 of 56 cells99% sure · 9,477 tokens · $0.197Gentle #6Solved 52 of 52 cells99% sure · 6,795 tokens · $0.143Steady #1Solved 53 of 53 cells99% sure · 10,144 tokens · $0.210Steady #2Solved 53 of 53 cells99% sure · 8,562 tokens · $0.179Steady #3Solved 49 of 49 cells99% sure · 6,845 tokens · $0.144Steady #4Solved 54 of 54 cells99% sure · 13,500 tokens · $0.277Steady #5Solved 53 of 53 cells99% sure · 11,004 tokens · $0.227Steady #6Solved 54 of 54 cells99% sure · 22,349 tokens · $0.454Tricky #1Solved 55 of 55 cells99% sure · 9,881 tokens · $0.205Tricky #2Solved 57 of 57 cells99% sure · 38,164 tokens · $0.771Tricky #3Solved 57 of 57 cells99% sure · 19,667 tokens · $0.401Tricky #4Solved 54 of 54 cells98% sure · 9,107 tokens · $0.189Tricky #5Solved 55 of 55 cells99% sure · 7,272 tokens · $0.153Tricky #6Solved 56 of 56 cells99% sure · 16,603 tokens · $0.339Devious #1Solved 55 of 55 cells99% sure · 12,170 tokens · $0.251Devious #2Solved 55 of 55 cells99% sure · 11,121 tokens · $0.230Devious #3Solved 49 of 49 cells99% sure · 6,056 tokens · $0.128Devious #4Solved 40 of 40 cells98% sure · 4,464 tokens · $0.097Devious #5Solved 47 of 47 cells98% sure · 7,356 tokens · $0.154Devious #6Solved 54 of 54 cells99% sure · 9,224 tokens · $0.192Expert #1Solved 58 of 58 cells99% sure · 18,807 tokens · $0.383Expert #2Solved 53 of 53 cells99% sure · 6,811 tokens · $0.144Expert #3Solved 54 of 54 cells99% sure · 9,845 tokens · $0.204Expert #4Solved 57 of 57 cells98% sure · 14,467 tokens · $0.297Expert #5Solved 58 of 58 cells99% sure · 11,675 tokens · $0.241Expert #6Solved 54 of 54 cells98% sure · 8,959 tokens · $0.186Beyond #1Solved 60 of 60 cells99% sure · 15,536 tokens · $0.314Beyond #2Solved 57 of 57 cells99% sure · 30,356 tokens · $0.610Beyond #3Solved 56 of 56 cells99% sure · 26,961 tokens · $0.547Beyond #4Solved 57 of 57 cells99% sure · 14,079 tokens · $0.289Beyond #5Solved 59 of 59 cells99% sure · 13,090 tokens · $0.269Beyond #6Solved 57 of 57 cells99% sure · 25,750 tokens · $0.522