Model comparison
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Differences vs. k2.8 · high
Score, cost & time differences
Current baseline · k2.8 · high
70Knowledge & Reasoning
Compared with k2.8 · high
- k2.8 · max
Knowledge & Reasoning: tiedReference cost $0.59 ($0.39 more)Evaluation time 53m 24s (28m 40s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | k2.8 · high | k2.8 · max |
|---|---|---|
| Knowledge & Reasoning | k2.8high 70 | k2.8max 70Tied |
| Overall | k2.8high 63.55 | k2.8max — |
| Backend engineering | k2.8high 54 | k2.8max — |
| Frontend interaction | k2.8high 72 | k2.8max — |
| Visual aesthetics | k2.8high 57 | k2.8max — |
| Maintainability | k2.8high 53 | k2.8max — |
Knowledge & Reasoning evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Knowledge & Reasoning evaluation| Metric | k2.8 · high | k2.8 · max |
|---|---|---|
| Reference cost | k2.8high $0.20 | k2.8max $0.59+$0.39 |
| Evaluation time | k2.8high 24m 45s | k2.8max 53m 24s+115.8% |
Capability profiles
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Behind each score
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Backend engineeringSubscores
| Scoring dimension | k2.8high | k2.8max |
|---|---|---|
| Contracts and boundaries | 9 / 20 | — |
| Retries and failures | 15 / 20 | — |
| CI and adversarial review | 14 / 20 | — |
| Transactions and consistency | 9 / 20 | — |
| Caching and regression | 7 / 20 | — |
Frontend interactionSubscores
| Scoring dimension | k2.8high | k2.8max |
|---|---|---|
| Layout and adaptation | 16 / 20 | — |
| Interaction behavior | 18 / 20 | — |
| State continuity | 15 / 20 | — |
| Accessibility and feedback | 10 / 15 | — |
| State validation and regression | 13 / 25 | — |
Knowledge & ReasoningSubscores
| Scoring dimension | k2.8high | k2.8max |
|---|---|---|
| Mathematical reasoning | 5 / 15 | 10 / 15 |
| Computer science & AI | 5 / 15 | 15 / 15 |
| Science and engineering | 5 / 10 | 0 / 10 |
| Life sciences and medicine | 20 / 20 | 15 / 20 |
| Humanities and general knowledge | 35 / 40 | 30 / 40 |
Visual aestheticsSubscores
| Scoring dimension | k2.8high | k2.8max |
|---|---|---|
| Composition | 16 / 20 | — |
| Spacing and alignment | 17 / 20 | — |
| Typography and expression | 16 / 20 | — |
| Color and surfaces | 19 / 20 | — |
| Control styling | 15 / 20 | — |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | k2.8high | k2.8max |
|---|---|---|
| Semantic clarity | 14 / 20 | — |
| Control-flow organization | 19 / 20 | — |
| Locality of changes | 15 / 20 | — |
| State and lifecycle | 17 / 20 | — |
| Implementation economy | 16 / 20 | — |
Subscores retain their original scale; the axis score uses a consistent conversion.