Model comparison
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Differences vs. hy4-preview · high
Score, cost & time differences
Current baseline · hy4-preview · high
73Frontend interaction
Compared with hy4-preview · high
- k2.8 · high
Frontend interaction: −1 ptsReference cost $0.25 ($0.11 more)Evaluation time 23m 59s (10m 34s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | hy4-preview · high | k2.8 · high |
|---|---|---|
| Frontend interaction | hy4-previewhigh 73 | k2.8high 72−1 pts |
| Overall | hy4-previewhigh 66.70 | k2.8high 63.55−3.15 pts |
| Backend engineering | hy4-previewhigh 74 | k2.8high 54−20 pts |
| Knowledge & Reasoning | hy4-previewhigh 65 | k2.8high 70+5 pts |
| Visual aesthetics | hy4-previewhigh 59 | k2.8high 57−2 pts |
| Maintainability | hy4-previewhigh 57 | k2.8high 53−4 pts |
Frontend interaction evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Frontend interaction evaluation| Metric | hy4-preview · high | k2.8 · high |
|---|---|---|
| Reference cost | hy4-previewhigh $0.14 | k2.8high $0.25+$0.11 |
| Evaluation time | hy4-previewhigh 13m 25s | k2.8high 23m 59s+78.8% |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | hy4-previewhigh | k2.8high |
|---|---|---|
| Contracts and boundaries | 14 / 20 | 9 / 20 |
| Retries and failures | 17 / 20 | 15 / 20 |
| CI and adversarial review | 12 / 20 | 14 / 20 |
| Transactions and consistency | 16 / 20 | 9 / 20 |
| Caching and regression | 15 / 20 | 7 / 20 |
Frontend interactionSubscores
| Scoring dimension | hy4-previewhigh | k2.8high |
|---|---|---|
| Layout and adaptation | 18 / 20 | 16 / 20 |
| Interaction behavior | 20 / 20 | 18 / 20 |
| State continuity | 10 / 20 | 15 / 20 |
| Accessibility and feedback | 11 / 15 | 10 / 15 |
| State validation and regression | 14 / 25 | 13 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | hy4-previewhigh | k2.8high |
|---|---|---|
| Mathematical reasoning | 15 / 15 | 5 / 15 |
| Computer science & AI | 10 / 15 | 5 / 15 |
| Science and engineering | 0 / 10 | 5 / 10 |
| Life sciences and medicine | 15 / 20 | 20 / 20 |
| Humanities and general knowledge | 25 / 40 | 35 / 40 |
Visual aestheticsSubscores
| Scoring dimension | hy4-previewhigh | k2.8high |
|---|---|---|
| Composition | 18 / 20 | 16 / 20 |
| Spacing and alignment | 16 / 20 | 17 / 20 |
| Typography and expression | 17 / 20 | 16 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 14 / 20 | 15 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | hy4-previewhigh | k2.8high |
|---|---|---|
| Semantic clarity | 15 / 20 | 14 / 20 |
| Control-flow organization | 18 / 20 | 19 / 20 |
| Locality of changes | 16 / 20 | 15 / 20 |
| State and lifecycle | 17 / 20 | 17 / 20 |
| Implementation economy | 17 / 20 | 16 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.