GPT-5.3 Codex (Xhigh) vs o3-mini

GPT-5.3 Codex (Xhigh) vs o3-mini. 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
-
OpenAIo3-miniNot ranked · benchmark data missing
Intelligence
12.50
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-5.3 Codex (Xhigh)o3-miniDifference
Intelligence (higher is better)32.512.5−61.5% o3-mini is 61.5% less intelligent
Total AA cost (lower is better)Not reportedNot reported— not comparable
End-to-end time (lower is better)62.23s8.88s−85.7% o3-mini is 85.7% faster
Price per 1M tokens (in / out)$1.75 / $14.0$1.10 / $4.40
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.3 Codex (Xhigh): what beats ito3-mini: what beats it
Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-3-codex/o3-mini · Markdown: /api/v1/compare/gpt-5-3-codex/o3-mini?format=md · llms.txt · agent skill