Claude Opus 5.5 (High, Default Fallback) vs Grok 4.3 (Low)

Claude Opus 5.5 (High, Default Fallback) vs Grok 4.3 (Low). 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
SpaceXAIGrok 4.3 (Low)Not ranked · benchmark data missing
Intelligence
24.30
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)Grok 4.3 (Low)Difference
Intelligence (higher is better)53.624.3−54.7% Grok 4.3 (Low) is 54.7% less intelligent
Total AA cost (lower is better)$2,172.43Not reported— not comparable
End-to-end time (lower is better)33.81s13.01s−61.5% Grok 4.3 (Low) is 61.5% faster
Price per 1M tokens (in / out)$4.00 / $20.0$1.25 / $2.50
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude Opus 5.5 (High, Default Fallback): what beats itGrok 4.3 (Low): 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/grok-4-3-low · Markdown: /api/v1/compare/claude-opus-5-5-high/grok-4-3-low?format=md · llms.txt · agent skill