GPT-5.5 (Xhigh) vs Step 3.5 Flash 2603

GPT-5.5 (Xhigh) vs Step 3.5 Flash 2603. A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

OpenAIGPT-5.5 (Xhigh)Off the frontier
Intelligence
38.40
Total cost
$5294
StepFunStep 3.5 Flash 2603Not ranked · benchmark data missing
Intelligence
17.00
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-5.5 (Xhigh)Step 3.5 Flash 2603Difference
Intelligence (higher is better)38.417.0−55.7% Step 3.5 Flash 2603 is 55.7% less intelligent
Total AA cost (lower is better)$5,294.36Not reported— not comparable
End-to-end time (lower is better)44.96s21.03s−53.2% Step 3.5 Flash 2603 is 53.2% faster
Price per 1M tokens (in / out)$5.00 / $30.0$0.10 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.5 (Xhigh): what beats itStep 3.5 Flash 2603: what beats it
Matchup

Compare something else

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