GPT-5.3 Codex (Xhigh) vs Nemotron 3 Ultra 550B A55B (Reasoning)

GPT-5.3 Codex (Xhigh) vs Nemotron 3 Ultra 550B A55B (Reasoning). 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
-
NVIDIANemotron 3 Ultra 550B A55B (Reasoning)Off the frontier
Intelligence
22.90
Total cost
$697
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)Nemotron 3 Ultra 550B A55B (Reasoning)Difference
Intelligence (higher is better)32.522.9−29.5% Nemotron 3 Ultra 550B… is 29.5% less intelligent
Total AA cost (lower is better)Not reported$696.84— not comparable
End-to-end time (lower is better)60.67s15.17s−75.0% Nemotron 3 Ultra 550B… is 75.0% faster
Price per 1M tokens (in / out)$1.75 / $14.0$0.60 / $2.70
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.3 Codex (Xhigh): what beats itNemotron 3 Ultra 550B A55B (Reasoning): 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/nvidia-nemotron-3-ultra-550b-a55b · Markdown: /api/v1/compare/gpt-5-3-codex/nvidia-nemotron-3-ultra-550b-a55b?format=md · llms.txt · agent skill