Claude Fable 5.1 (Max, Default Fallback) vs Step 3.5 Flash

Claude Fable 5.1 (Max, Default Fallback) vs Step 3.5 Flash. A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude Fable 5.1 (Max, Default Fallback)Off the frontier
Intelligence
53.40
Total cost
$13129
StepFunStep 3.5 FlashNot ranked · benchmark data missing
Intelligence
16.60
Total cost
-
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.

MetricClaude Fable 5.1 (Max, Default Fallback)Step 3.5 FlashDifference
Intelligence (higher is better)53.416.6−68.9% Step 3.5 Flash is 68.9% less intelligent
Total AA cost (lower is better)$13,128.86Not reported— not comparable
End-to-end time (lower is better)201.53s18.34s−90.9% Step 3.5 Flash is 90.9% faster
Price per 1M tokens (in / out)$10.0 / $50.0$0.10 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Fable 5.1 (Max, Default Fallback): what beats itStep 3.5 Flash: what beats it
Matchup

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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-fable-5-1/step-3-5-flash-0202 · Markdown: /api/v1/compare/claude-fable-5-1/step-3-5-flash-0202?format=md · llms.txt · agent skill