GPT-5.6 Luna (Max) vs Grok 4.20 0309 (Reasoning)

GPT-5.6 Luna (Max) vs Grok 4.20 0309 (Reasoning). 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 (Max)Off the frontier
Intelligence
37.30
Total cost
$320
SpaceXAIGrok 4.20 0309 (Reasoning)Not ranked · benchmark data missing
Intelligence
25.20
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 (Max)Grok 4.20 0309 (Reasoning)Difference
Intelligence (higher is better)37.325.2−32.4% Grok 4.20 0309 (Reaso… is 32.4% less intelligent
Total AA cost (lower is better)$319.93Not reported— not comparable
End-to-end time (lower is better)124.29sNot reported— not comparable
Price per 1M tokens (in / out)$0.20 / $1.20$2.00 / $6.00
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerGPT-5.6 Luna (Max): what beats itGrok 4.20 0309 (Reasoning): 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/grok-4-20-0309 · Markdown: /api/v1/compare/gpt-5-6-luna/grok-4-20-0309?format=md · llms.txt · agent skill