GPT-5.6 Luna (Medium) vs Step 3.5 Flash

GPT-5.6 Luna (Medium) 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 (Medium)Off the frontier
Intelligence
25.00
Total cost
$44.3
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 (Medium)Step 3.5 FlashDifference
Intelligence (higher is better)25.016.6−33.6% Step 3.5 Flash is 33.6% less intelligent
Total AA cost (lower is better)$44.32Not reported— not comparable
End-to-end time (lower is better)5.82s20.68s+255.3% Step 3.5 Flash is 255.3% slower
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 (Medium): 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-medium/step-3-5-flash-0202 · Markdown: /api/v1/compare/gpt-5-6-luna-medium/step-3-5-flash-0202?format=md · llms.txt · agent skill