GPT-5.6 Luna (Low) vs Grok 4.3 (Medium)

GPT-5.6 Luna (Low) vs Grok 4.3 (Medium). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

OpenAIGPT-5.6 Luna (Low)Off the frontier
Intelligence
21.00
Total cost
$27.0
SpaceXAIGrok 4.3 (Medium)Not ranked · benchmark data missing
Intelligence
24.80
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.

MetricGPT-5.6 Luna (Low)Grok 4.3 (Medium)Difference
Intelligence (higher is better)21.024.8+18.1% Grok 4.3 (Medium) is 18.1% more intelligent
Total AA cost (lower is better)$27.02Not reported— not comparable
End-to-end time (lower is better)5.84s21.27s+264.2% Grok 4.3 (Medium) is 264.2% slower
Price per 1M tokens (in / out)$0.20 / $1.20$1.25 / $2.50
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerGPT-5.6 Luna (Low): what beats itGrok 4.3 (Medium): what beats it
Matchup

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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-luna-low/grok-4-3-medium · Markdown: /api/v1/compare/gpt-5-6-luna-low/grok-4-3-medium?format=md · llms.txt · agent skill