Model comparison
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Differences vs. claude-opus-5 · high
Score, cost & time differences
Current baseline · claude-opus-5 · high
90Knowledge & Reasoning
Compared with claude-opus-5 · high
- claude-opus-4-8 · xhigh
Knowledge & Reasoning: tiedReference cost $2.20 ($1.70 more)Evaluation time 40m 31s (5m 51s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | claude-opus-5 · high | claude-opus-4-8 · xhigh |
|---|---|---|
| Knowledge & Reasoning | claude-opus-5high 90 | claude-opus-4-8xhigh 90Tied |
| Overall | claude-opus-5high 76.95 | claude-opus-4-8xhigh 76.80−0.15 pts |
| Backend engineering | claude-opus-5high 68 | claude-opus-4-8xhigh 61−7 pts |
| Frontend interaction | claude-opus-5high 85 | claude-opus-4-8xhigh 87+2 pts |
| Visual aesthetics | claude-opus-5high 61 | claude-opus-4-8xhigh 68+7 pts |
| Maintainability | claude-opus-5high 57 | claude-opus-4-8xhigh 55−2 pts |
Knowledge & Reasoning evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Knowledge & Reasoning evaluation| Metric | claude-opus-5 · high | claude-opus-4-8 · xhigh |
|---|---|---|
| Reference cost | claude-opus-5high $0.50 | claude-opus-4-8xhigh $2.20+$1.70 |
| Evaluation time | claude-opus-5high 34m 41s | claude-opus-4-8xhigh 40m 31s+16.9% |
Capability profiles
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Behind each score
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Backend engineeringSubscores
| Scoring dimension | claude-opus-5high | claude-opus-4-8xhigh |
|---|---|---|
| Contracts and boundaries | 11 / 20 | 7 / 20 |
| Retries and failures | 17 / 20 | 16 / 20 |
| CI and adversarial review | 10 / 20 | 11 / 20 |
| Transactions and consistency | 14 / 20 | 15 / 20 |
| Caching and regression | 16 / 20 | 12 / 20 |
Frontend interactionSubscores
| Scoring dimension | claude-opus-5high | claude-opus-4-8xhigh |
|---|---|---|
| Layout and adaptation | 18 / 20 | 20 / 20 |
| Interaction behavior | 20 / 20 | 20 / 20 |
| State continuity | 15 / 20 | 20 / 20 |
| Accessibility and feedback | 13 / 15 | 12 / 15 |
| State validation and regression | 19 / 25 | 15 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | claude-opus-5high | claude-opus-4-8xhigh |
|---|---|---|
| Mathematical reasoning | 15 / 15 | 15 / 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 | 40 / 40 | 35 / 40 |
Visual aestheticsSubscores
| Scoring dimension | claude-opus-5high | claude-opus-4-8xhigh |
|---|---|---|
| Composition | 19 / 20 | 20 / 20 |
| Spacing and alignment | 16 / 20 | 16 / 20 |
| Typography and expression | 16 / 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 | claude-opus-5high | 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 | 17 / 20 | 16 / 20 |
| Implementation economy | 17 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.