Claude Opus 5.5
AnthropicClaude CodeReasoning: high
Claude Opus 5.5 gets about 3 vocabulary questions in 10 right. It does best in Kabyle. Its weakest spot is writing Tarifit words in Tifinagh. It swaps Tifinagh and Latin letters almost perfectly (96.0 out of 100).
Rank 3 of 9
TifinaghBench score
27.3out of 100
95% interval 26.3–28.3
26.3 with strict spelling
0–100, with 95% interval
Script score
96.0out of 100
95% interval 95.3–96.7
77.6 with strict spelling
Transliteration score, 0–100
Scores by dialect and task
Share of the score earned in each cell, 0–100. The transliteration column measures the script, not the vocabulary.
Standard Moroccan Amazigh
- Tifinagh → English
- 22.0175 correct, 89 partial, 736 wrong of 1000
- English → Tifinagh
- 9.696 correct, 0 partial, 904 wrong of 1000
- Tifinagh ↔ Latin
- 99.1991 correct, 0 partial, 9 wrong of 1000
Tarifit
- Tifinagh → English
- 37.2314 correct, 110 partial, 569 wrong of 993
- English → Tifinagh
- 7.070 correct, 0 partial, 923 wrong of 993
- Tifinagh ↔ Latin
- 92.5925 correct, 0 partial, 75 wrong of 1000
Kabyle
- Tifinagh → English
- 59.0530 correct, 117 partial, 350 wrong of 997
- English → Tifinagh
- 29.0289 correct, 0 partial, 708 wrong of 997
- Tifinagh ↔ Latin
- 96.5965 correct, 0 partial, 35 wrong of 1000
| Tifinagh → English | English → Tifinagh | Tifinagh ↔ Latin | |
|---|---|---|---|
| Standard Moroccan Amazigh | 22.0175 correct, 89 partial, 736 wrong of 1000 | 9.696 correct, 0 partial, 904 wrong of 1000 | 99.1991 correct, 0 partial, 9 wrong of 1000 |
| Tarifit | 37.2314 correct, 110 partial, 569 wrong of 993 | 7.070 correct, 0 partial, 923 wrong of 993 | 92.5925 correct, 0 partial, 75 wrong of 1000 |
| Kabyle | 59.0530 correct, 117 partial, 350 wrong of 997 | 29.0289 correct, 0 partial, 708 wrong of 997 | 96.5965 correct, 0 partial, 35 wrong of 1000 |
By dialect
Meaning tasks only
- Standard Moroccan Amazigh15.8
- Tarifit22.1
- Kabyle44.0
By task
- Tifinagh → English39.4
- English → Tifinagh15.2
- Tifinagh ↔ Latin96.0
Tifinagh → English grades
Free-text meanings, graded by the judge or matched exactly.
- Correct
- Partial
- Wrong
- Failed
Standard Moroccan Amazigh175 correct, 89 partial, 736 wrong of 1000
Tarifit314 correct, 110 partial, 569 wrong of 993
Kabyle530 correct, 117 partial, 350 wrong of 997
Character error rate
For exact-match answers: the smallest edit distance to an accepted answer, divided by its length. Lower is better; it shows near misses that a 0 score hides.
| English → Tifinagh | Tifinagh ↔ Latin | |
|---|---|---|
| Standard Moroccan Amazigh | 70.0% | 0.1% |
| Tarifit | 82.1% | 16.9% |
| Kabyle | 51.3% | 0.9% |
The run
- Setup
- Official setup
- Harness
- Claude Code 2.1.302@anthropic-ai/claude-agent-sdk 0.3.303
- Judge
- Claude Haiku 5.5 (Claude Code)
- Sample
- 1,000 words per dialect, seed 1
- Batch size
- 100
- Sessions
- 100 answer, 31 judge
- Tokens
- 735,978 in · 728,783 out · 494,495 reasoning
- Model cost
- $17.01 (API-equivalent; run on a subscription)
- Judge cost
- $0.18
- Dates
- 20 Oct 2026, 22:36 UTC → 20 Oct 2026, 22:39 UTC
- CLI version
- 0.1.0
Dataset checksums
SHA-256 of each dictionary file, so the run can be checked once the datasets are released.
- Standard Moroccan Amazigh
633505d9ccd2244f9a53b64f56bd153c428cc3dbd7229066845404bf3d7c5060 - Tarifit
d144a5619aa31cc06ffcc4eb26c361c65ca2c71451dfdfbea7fa134206481c4f - Kabyle
ed3a9882ac0f4ef10630917a302fd7d9ff6ac706654bb317b94c715f6b4cf9ea