GPT-5.6 Luna (Xhigh) vs GPT-5 Codex (High)

GPT-5.6 Luna (Xhigh) vs GPT-5 Codex (High). 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 (Xhigh)Off the frontier
Intelligence
34.60
Total cost
$179
OpenAIGPT-5 Codex (High)Not ranked · benchmark data missing
Intelligence
24.90
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 (Xhigh)GPT-5 Codex (High)Difference
Intelligence (higher is better)34.624.9−28.0% GPT-5 Codex (High) is 28.0% less intelligent
Total AA cost (lower is better)$179.33Not reported— not comparable
End-to-end time (lower is better)35.85s12.53s−65.0% GPT-5 Codex (High) is 65.0% faster
Price per 1M tokens (in / out)$0.20 / $1.20$1.25 / $10.0
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerGPT-5.6 Luna (Xhigh): what beats itGPT-5 Codex (High): 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-xhigh/gpt-5-codex · Markdown: /api/v1/compare/gpt-5-6-luna-xhigh/gpt-5-codex?format=md · llms.txt · agent skill