Claude 4 Sonnet (Reasoning) vs Claude Fable 5.1 (Medium, Default Fallback)
Claude 4 Sonnet (Reasoning) vs Claude Fable 5.1 (Medium, Default Fallback). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
Verdict
Comparison incomplete
A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
| Metric | Claude 4 Sonnet (Reasoning) | Claude Fable 5.1 (Medium, Default Fallback) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 18.9 | 48.9 | +158.7% Claude Fable 5.1 (Med… is 2.6× more intelligent |
| Total AA cost (lower is better) | Not reported | $3,983.28 | — not comparable |
| End-to-end time (lower is better) | Not reported | 14.35s | — not comparable |
| Price per 1M tokens (in / out) | — | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-4-sonnet-thinking/claude-fable-5-1-medium · Markdown: /api/v1/compare/claude-4-sonnet-thinking/claude-fable-5-1-medium?format=md · llms.txt · agent skill