Model comparison
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Differences vs. claude-opus-5 · xhigh
Score, cost & time differences
Current baseline · claude-opus-5 · xhigh
74Backend engineering
Compared with claude-opus-5 · xhigh
- hy4-preview · high
Backend engineering: tiedReference cost $0.40 ($1.61 less)Evaluation time 67m 39s (48m 57s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | claude-opus-5 · xhigh | hy4-preview · high |
|---|---|---|
| Backend engineering | claude-opus-5xhigh 74 | hy4-previewhigh 74Tied |
| Overall | claude-opus-5xhigh 77.75 | hy4-previewhigh 66.70−11.05 pts |
| Frontend interaction | claude-opus-5xhigh 87 | hy4-previewhigh 73−14 pts |
| Knowledge & Reasoning | claude-opus-5xhigh 85 | hy4-previewhigh 65−20 pts |
| Visual aesthetics | claude-opus-5xhigh 66 | hy4-previewhigh 59−7 pts |
| Maintainability | claude-opus-5xhigh 59 | hy4-previewhigh 57−2 pts |
Backend engineering evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Backend engineering evaluation| Metric | claude-opus-5 · xhigh | hy4-preview · high |
|---|---|---|
| Reference cost | claude-opus-5xhigh $2.01 | hy4-previewhigh $0.40−$1.61 |
| Evaluation time | claude-opus-5xhigh 18m 42s | hy4-previewhigh 67m 39s+261.8% |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | claude-opus-5xhigh | hy4-previewhigh |
|---|---|---|
| Contracts and boundaries | 16 / 20 | 14 / 20 |
| Retries and failures | 15 / 20 | 17 / 20 |
| CI and adversarial review | 12 / 20 | 12 / 20 |
| Transactions and consistency | 15 / 20 | 16 / 20 |
| Caching and regression | 16 / 20 | 15 / 20 |
Frontend interactionSubscores
| Scoring dimension | claude-opus-5xhigh | hy4-previewhigh |
|---|---|---|
| Layout and adaptation | 18 / 20 | 18 / 20 |
| Interaction behavior | 20 / 20 | 20 / 20 |
| State continuity | 15 / 20 | 10 / 20 |
| Accessibility and feedback | 13 / 15 | 11 / 15 |
| State validation and regression | 21 / 25 | 14 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | claude-opus-5xhigh | hy4-previewhigh |
|---|---|---|
| Mathematical reasoning | 15 / 15 | 15 / 15 |
| Computer science & AI | 5 / 15 | 10 / 15 |
| Science and engineering | 10 / 10 | 0 / 10 |
| Life sciences and medicine | 20 / 20 | 15 / 20 |
| Humanities and general knowledge | 35 / 40 | 25 / 40 |
Visual aestheticsSubscores
| Scoring dimension | claude-opus-5xhigh | hy4-previewhigh |
|---|---|---|
| Composition | 18 / 20 | 18 / 20 |
| Spacing and alignment | 17 / 20 | 16 / 20 |
| Typography and expression | 16 / 20 | 17 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 17 / 20 | 14 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | claude-opus-5xhigh | hy4-previewhigh |
|---|---|---|
| Semantic clarity | 14 / 20 | 15 / 20 |
| Control-flow organization | 20 / 20 | 18 / 20 |
| Locality of changes | 16 / 20 | 16 / 20 |
| State and lifecycle | 17 / 20 | 17 / 20 |
| Implementation economy | 17 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.