Claude 4.5 Sonnet (Non-reasoning) vs Claude Opus 5.5 (Low, Default Fallback)

Claude 4.5 Sonnet (Non-reasoning) vs Claude Opus 5.5 (Low, Default Fallback). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude 4.5 Sonnet (Non-reasoning)Not ranked · benchmark data missing
Intelligence
19.30
Total cost
-
AnthropicClaude Opus 5.5 (Low, Default Fallback)Off the frontier
Intelligence
42.30
Total cost
$860
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 4.5 Sonnet (Non-reasoning)Claude Opus 5.5 (Low, Default Fallback)Difference
Intelligence (higher is better)19.342.3+119.2% Claude Opus 5.5 (Low,… is 2.2× more intelligent
Total AA cost (lower is better)Not reported$860.33— not comparable
End-to-end time (lower is better)12.54s13.42s+7.0% Claude Opus 5.5 (Low,… is 7.0% slower
Price per 1M tokens (in / out)$3.00 / $15.0$4.00 / $20.0
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude 4.5 Sonnet (Non-reasoning): what beats itClaude Opus 5.5 (Low, Default Fallback): 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-4-5-sonnet/claude-opus-5-5-low · Markdown: /api/v1/compare/claude-4-5-sonnet/claude-opus-5-5-low?format=md · llms.txt · agent skill