Claude Opus 5.5 (High, Default Fallback) vs Step 3.5 Flash

Claude Opus 5.5 (High, 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 Opus 5.5 (High, Default Fallback)On the frontier
Intelligence
53.60
Total cost
$2172
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 Opus 5.5 (High, Default Fallback)Step 3.5 FlashDifference
Intelligence (higher is better)53.616.6−69.0% Step 3.5 Flash is 69.0% less intelligent
Total AA cost (lower is better)$2,172.43Not reported— not comparable
End-to-end time (lower is better)33.81s20.68s−38.8% Step 3.5 Flash is 38.8% faster
Price per 1M tokens (in / out)$4.00 / $20.0$0.10 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Opus 5.5 (High, 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-opus-5-5-high/step-3-5-flash-0202 · Markdown: /api/v1/compare/claude-opus-5-5-high/step-3-5-flash-0202?format=md · llms.txt · agent skill