Model comparison
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Differences vs. Gemini 4 Carbon · high
Score, cost & time differences
Current baseline · Gemini 4 Carbon · high
68Maintainability
Compared with Gemini 4 Carbon · high
- Claude Fable 5.1 · max
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 | Gemini 4 Carbon · high | Claude Fable 5.1 · max |
|---|---|---|
| Maintainability | Gemini 4 Carbonhigh 68 | Claude Fable 5.1max 68Tied |
| Overall | Gemini 4 Carbonhigh 89.60 | Claude Fable 5.1max 87.40−2.2 pts |
| Backend engineering | Gemini 4 Carbonhigh 90 | Claude Fable 5.1max 83−7 pts |
| Frontend interaction | Gemini 4 Carbonhigh 95 | Claude Fable 5.1max 91−4 pts |
| Knowledge & reasoning | Gemini 4 Carbonhigh 95 | Claude Fable 5.1max 95Tied |
| Visual aesthetics | Gemini 4 Carbonhigh 78 | Claude Fable 5.1max 80+2 pts |
Maintainability evaluation · Evaluation consumption, not a monthly subscription fee
Cost & time
Maintainability evaluation| Metric | Gemini 4 Carbon · high | Claude Fable 5.1 · max |
|---|---|---|
| Cost | Gemini 4 Carbonhigh N/A | Claude Fable 5.1max N/A |
| Evaluation time | Gemini 4 Carbonhigh — | Claude Fable 5.1max — |
Capability profiles
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Behind each score
Expand to inspect each subaxis.
Backend engineeringSubscores
| Scoring dimension | Gemini 4 Carbonhigh | Claude Fable 5.1max |
|---|---|---|
| Contracts and boundaries | 17 / 20 | 13 / 20 |
| Retries and failures | 19 / 20 | 20 / 20 |
| CI and adversarial review | 16 / 20 | 14 / 20 |
| Transactions and consistency | 18 / 20 | 19 / 20 |
| Caching and regression | 20 / 20 | 17 / 20 |
Frontend interactionSubscores
| Scoring dimension | Gemini 4 Carbonhigh | Claude Fable 5.1max |
|---|---|---|
| Layout and adaptation | 20 / 20 | 20 / 20 |
| Interaction behavior | 20 / 20 | 20 / 20 |
| State continuity | 18 / 20 | 15 / 20 |
| Accessibility and feedback | 14 / 15 | 13 / 15 |
| State validation and regression | 23 / 25 | 23 / 25 |
Knowledge & reasoningSubscores
| Scoring dimension | Gemini 4 Carbonhigh | Claude Fable 5.1max |
|---|---|---|
| Mathematical reasoning | 15 / 15 | 15 / 15 |
| Computer science & AI | 15 / 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 | Gemini 4 Carbonhigh | Claude Fable 5.1max |
|---|---|---|
| Composition | 19 / 20 | 20 / 20 |
| Spacing and alignment | 18 / 20 | 18 / 20 |
| Typography and expression | 18 / 20 | 19 / 20 |
| Color and surfaces | 19 / 20 | 19 / 20 |
| Control styling | 18 / 20 | 17 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.
MaintainabilitySubscores
| Scoring dimension | Gemini 4 Carbonhigh | Claude Fable 5.1max |
|---|---|---|
| Semantic clarity | 18 / 20 | 16 / 20 |
| Control-flow organization | 18 / 20 | 20 / 20 |
| Locality of changes | 17 / 20 | 15 / 20 |
| State and lifecycle | 18 / 20 | 18 / 20 |
| Implementation economy | 17 / 20 | 19 / 20 |
Subscores retain their original scale; the axis score uses a consistent conversion.