Grok 4.20 0309 v2 (Reasoning) vs Step 3.5 Flash

Grok 4.20 0309 v2 (Reasoning) 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.

SpaceXAIGrok 4.20 0309 v2 (Reasoning)Not ranked · benchmark data missing
Intelligence
25.70
Total cost
-
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.

MetricGrok 4.20 0309 v2 (Reasoning)Step 3.5 FlashDifference
Intelligence (higher is better)25.716.6−35.4% Step 3.5 Flash is 35.4% less intelligent
Total AA cost (lower is better)Not reportedNot reported— not comparable
End-to-end time (lower is better)20.14s19.80s−1.7% Step 3.5 Flash is 1.7% faster
Price per 1M tokens (in / out)$1.25 / $2.50$0.10 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGrok 4.20 0309 v2 (Reasoning): what beats itStep 3.5 Flash: what beats it
Matchup

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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/grok-4-20/step-3-5-flash-0202 · Markdown: /api/v1/compare/grok-4-20/step-3-5-flash-0202?format=md · llms.txt · agent skill