Model comparison
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Differences vs. claude-opus-5 · xhigh
Score, cost & time differences
Current baseline · claude-opus-5 · xhigh
85Knowledge & Reasoning
Compared with claude-opus-5 · xhigh
- claude-sonnet-5-5 · xhigh
Knowledge & Reasoning: tiedReference cost $0.13 ($0.36 less)Evaluation time 3m 44s (31m 53s less)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | claude-opus-5 · xhigh | claude-sonnet-5-5 · xhigh |
|---|---|---|
| Knowledge & Reasoning | claude-opus-5xhigh 85 | claude-sonnet-5-5xhigh 85Tied |
| Overall | claude-opus-5xhigh 77.75 | claude-sonnet-5-5xhigh 82.30+4.55 pts |
| Backend engineering | claude-opus-5xhigh 74 | claude-sonnet-5-5xhigh 86+12 pts |
| Frontend interaction | claude-opus-5xhigh 87 | claude-sonnet-5-5xhigh 89+2 pts |
| Visual aesthetics | claude-opus-5xhigh 66 | claude-sonnet-5-5xhigh 73+7 pts |
| Maintainability | claude-opus-5xhigh 59 | claude-sonnet-5-5xhigh 66+7 pts |
Knowledge & Reasoning evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Knowledge & Reasoning evaluation| Metric | claude-opus-5 · xhigh | claude-sonnet-5-5 · xhigh |
|---|---|---|
| Reference cost | claude-opus-5xhigh $0.49 | claude-sonnet-5-5xhigh $0.13−$0.36 |
| Evaluation time | claude-opus-5xhigh 35m 37s | claude-sonnet-5-5xhigh 3m 44s−89.5% |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | claude-opus-5xhigh | claude-sonnet-5-5xhigh |
|---|---|---|
| Contracts and boundaries | 16 / 20 | 15 / 20 |
| Retries and failures | 15 / 20 | 18 / 20 |
| CI and adversarial review | 12 / 20 | 16 / 20 |
| Transactions and consistency | 15 / 20 | 18 / 20 |
| Caching and regression | 16 / 20 | 19 / 20 |
Frontend interactionSubscores
| Scoring dimension | claude-opus-5xhigh | claude-sonnet-5-5xhigh |
|---|---|---|
| Layout and adaptation | 18 / 20 | 17 / 20 |
| Interaction behavior | 20 / 20 | 20 / 20 |
| State continuity | 15 / 20 | 20 / 20 |
| Accessibility and feedback | 13 / 15 | 15 / 15 |
| State validation and regression | 21 / 25 | 17 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | claude-opus-5xhigh | claude-sonnet-5-5xhigh |
|---|---|---|
| Mathematical reasoning | 15 / 15 | 10 / 15 |
| Computer science & AI | 5 / 15 | 10 / 15 |
| Science and engineering | 10 / 10 | 10 / 10 |
| Life sciences and medicine | 20 / 20 | 20 / 20 |
| Humanities and general knowledge | 35 / 40 | 35 / 40 |
Visual aestheticsSubscores
| Scoring dimension | claude-opus-5xhigh | claude-sonnet-5-5xhigh |
|---|---|---|
| Composition | 18 / 20 | 20 / 20 |
| Spacing and alignment | 17 / 20 | 16 / 20 |
| Typography and expression | 16 / 20 | 18 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 17 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | claude-opus-5xhigh | claude-sonnet-5-5xhigh |
|---|---|---|
| Semantic clarity | 14 / 20 | 15 / 20 |
| Control-flow organization | 20 / 20 | 20 / 20 |
| Locality of changes | 16 / 20 | 16 / 20 |
| State and lifecycle | 17 / 20 | 17 / 20 |
| Implementation economy | 17 / 20 | 19 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.