GPT-5.3 Codex (Xhigh) vs Grok 4.3 (High)

GPT-5.3 Codex (Xhigh) vs Grok 4.3 (High). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

OpenAIGPT-5.3 Codex (Xhigh)Not ranked · benchmark data missing
Intelligence
32.50
Total cost
-
SpaceXAIGrok 4.3 (High)Off the frontier
Intelligence
24.90
Total cost
$363
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-5.3 Codex (Xhigh)Grok 4.3 (High)Difference
Intelligence (higher is better)32.524.9−23.4% Grok 4.3 (High) is 23.4% less intelligent
Total AA cost (lower is better)Not reported$363.24— not comparable
End-to-end time (lower is better)58.55s28.87s−50.7% Grok 4.3 (High) is 50.7% faster
Price per 1M tokens (in / out)$1.75 / $14.0$1.25 / $2.50
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerGPT-5.3 Codex (Xhigh): what beats itGrok 4.3 (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-5-3-codex/grok-4-3 · Markdown: /api/v1/compare/gpt-5-3-codex/grok-4-3?format=md · llms.txt · agent skill