GPT-5.6 Luna (Xhigh) vs Step 3.5 Flash

GPT-5.6 Luna (Xhigh) vs Step 3.5 Flash. 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
StepFunStep 3.5 FlashNot ranked · benchmark data missing
Intelligence
16.60
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)Step 3.5 FlashDifference
Intelligence (higher is better)34.616.6−52.0% Step 3.5 Flash is 52.0% less intelligent
Total AA cost (lower is better)$179.33Not reported— not comparable
End-to-end time (lower is better)39.18s17.36s−55.7% Step 3.5 Flash is 55.7% faster
Price per 1M tokens (in / out)$0.20 / $1.20$0.10 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.6 Luna (Xhigh): what beats itStep 3.5 Flash: what beats it
Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-luna-xhigh/step-3-5-flash-0202 · Markdown: /api/v1/compare/gpt-5-6-luna-xhigh/step-3-5-flash-0202?format=md · llms.txt · agent skill