Model comparison
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Differences vs. Step-5 Preview · default
Score, cost & time differences
Current baseline · Step-5 Preview · default
55Maintainability
Compared with Step-5 Preview · default
- Claude Opus 4.8 · xhigh
Maintainability: tiedComparable cost unavailableComparable time unavailable
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | Step-5 Preview · default | Claude Opus 4.8 · xhigh |
|---|---|---|
| Maintainability | Step-5 Previewdefault 55 | Claude Opus 4.8xhigh 55Tied |
| Overall | Step-5 Previewdefault 62.90 | Claude Opus 4.8xhigh 76.25+13.35 pts |
| Backend engineering | Step-5 Previewdefault 56 | Claude Opus 4.8xhigh 56Tied |
| Frontend interaction | Step-5 Previewdefault 61 | Claude Opus 4.8xhigh 85+24 pts |
| Knowledge & reasoning | Step-5 Previewdefault 75 | Claude Opus 4.8xhigh 90+15 pts |
| Visual aesthetics | Step-5 Previewdefault 47 | Claude Opus 4.8xhigh 68+21 pts |
Maintainability evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Maintainability evaluation| Metric | Step-5 Preview · default | Claude Opus 4.8 · xhigh |
|---|---|---|
| Cost | Step-5 Previewdefault N/A | Claude Opus 4.8xhigh N/A |
| Evaluation time | Step-5 Previewdefault — | Claude Opus 4.8xhigh — |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | Step-5 Previewdefault | Claude Opus 4.8xhigh |
|---|---|---|
| Contracts and boundaries | 9 / 20 | 7 / 20 |
| Retries and failures | 16 / 20 | 16 / 20 |
| CI and adversarial review | 8 / 20 | 11 / 20 |
| Transactions and consistency | 16 / 20 | 15 / 20 |
| Caching and regression | 7 / 20 | 7 / 20 |
Frontend interactionSubscores
| Scoring dimension | Step-5 Previewdefault | Claude Opus 4.8xhigh |
|---|---|---|
| Layout and adaptation | 18 / 20 | 20 / 20 |
| Interaction behavior | 13 / 20 | 20 / 20 |
| State continuity | 9 / 20 | 18 / 20 |
| Accessibility and feedback | 8 / 15 | 12 / 15 |
| State validation and regression | 13 / 25 | 15 / 25 |
Knowledge & reasoningSubscores
| Scoring dimension | Step-5 Previewdefault | Claude Opus 4.8xhigh |
|---|---|---|
| Mathematical reasoning | 10 / 15 | 15 / 15 |
| Computer science & AI | 10 / 15 | 10 / 15 |
| Science and engineering | 10 / 10 | 10 / 10 |
| Life sciences and medicine | 20 / 20 | 20 / 20 |
| Humanities and general knowledge | 25 / 40 | 35 / 40 |
Visual aestheticsSubscores
| Scoring dimension | Step-5 Previewdefault | Claude Opus 4.8xhigh |
|---|---|---|
| Composition | 15 / 20 | 20 / 20 |
| Spacing and alignment | 14 / 20 | 16 / 20 |
| Typography and expression | 15 / 20 | 17 / 20 |
| Color and surfaces | 18 / 20 | 19 / 20 |
| Control styling | 16 / 20 | 16 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | Step-5 Previewdefault | Claude Opus 4.8xhigh |
|---|---|---|
| Semantic clarity | 15 / 20 | 15 / 20 |
| Control-flow organization | 19 / 20 | 19 / 20 |
| Locality of changes | 15 / 20 | 15 / 20 |
| State and lifecycle | 16 / 20 | 16 / 20 |
| Implementation economy | 17 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.