Model comparison
Selected 2 / 5See the differences. Choose what matters to you.
Differences vs. claude-sonnet-5-5 · xhigh
Score, cost & time differences
Current baseline · claude-sonnet-5-5 · xhigh
86Backend engineering
Compared with claude-sonnet-5-5 · xhigh
- claude-fable-5-1 · max
Backend engineering: −1 ptsReference cost $12.77 ($11.27 more)Evaluation time 43m 45s (28m 41s more)
Differences reflect these evaluation tasks. Cost and time cover the same dimension, not a typical conversation. Scoring & cost notes
| Metric | claude-sonnet-5-5 · xhigh | claude-fable-5-1 · max |
|---|---|---|
| Backend engineering | claude-sonnet-5-5xhigh 86 | claude-fable-5-1max 85−1 pts |
| Overall | claude-sonnet-5-5xhigh 82.30 | claude-fable-5-1max 87.25+4.95 pts |
| Frontend interaction | claude-sonnet-5-5xhigh 89 | claude-fable-5-1max 91+2 pts |
| Knowledge & Reasoning | claude-sonnet-5-5xhigh 85 | claude-fable-5-1max 95+10 pts |
| Visual aesthetics | claude-sonnet-5-5xhigh 73 | claude-fable-5-1max 80+7 pts |
| Maintainability | claude-sonnet-5-5xhigh 66 | claude-fable-5-1max 68+2 pts |
Backend engineering evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Backend engineering evaluation| Metric | claude-sonnet-5-5 · xhigh | claude-fable-5-1 · max |
|---|---|---|
| Reference cost | claude-sonnet-5-5xhigh $1.50 | claude-fable-5-1max $12.77+$11.27 |
| Evaluation time | claude-sonnet-5-5xhigh 15m 3s | claude-fable-5-1max 43m 45s+190.6% |
Capability profiles
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Behind each score
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Backend engineeringSubscores
| Scoring dimension | claude-sonnet-5-5xhigh | claude-fable-5-1max |
|---|---|---|
| Contracts and boundaries | 15 / 20 | 13 / 20 |
| Retries and failures | 18 / 20 | 20 / 20 |
| CI and adversarial review | 16 / 20 | 14 / 20 |
| Transactions and consistency | 18 / 20 | 19 / 20 |
| Caching and regression | 19 / 20 | 19 / 20 |
Frontend interactionSubscores
| Scoring dimension | claude-sonnet-5-5xhigh | claude-fable-5-1max |
|---|---|---|
| Layout and adaptation | 17 / 20 | 20 / 20 |
| Interaction behavior | 20 / 20 | 20 / 20 |
| State continuity | 20 / 20 | 15 / 20 |
| Accessibility and feedback | 15 / 15 | 13 / 15 |
| State validation and regression | 17 / 25 | 23 / 25 |
Knowledge & ReasoningSubscores
| Scoring dimension | claude-sonnet-5-5xhigh | claude-fable-5-1max |
|---|---|---|
| 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 | 35 / 40 | 40 / 40 |
Visual aestheticsSubscores
| Scoring dimension | claude-sonnet-5-5xhigh | claude-fable-5-1max |
|---|---|---|
| Composition | 20 / 20 | 20 / 20 |
| Spacing and alignment | 16 / 20 | 18 / 20 |
| Typography and expression | 18 / 20 | 19 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 17 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | claude-sonnet-5-5xhigh | claude-fable-5-1max |
|---|---|---|
| Semantic clarity | 15 / 20 | 16 / 20 |
| Control-flow organization | 20 / 20 | 20 / 20 |
| Locality of changes | 16 / 20 | 15 / 20 |
| State and lifecycle | 17 / 20 | 18 / 20 |
| Implementation economy | 19 / 20 | 19 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.