GPT-5.3 Codex (xhigh) vs GPT-5.5 (medium)
GPT-5.3 Codex (xhigh) vs GPT-5.5 (medium). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
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.
| Metric | GPT-5.3 Codex (xhigh) | GPT-5.5 (medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.5 | 34.2 | +5.2% GPT-5.5 (medium) is 5.2% more intelligent |
| Total AA cost (lower is better) | Not reported | $2,095.12 | — not comparable |
| End-to-end time (lower is better) | 69.02s | 11.45s | −83.4% GPT-5.5 (medium) is 83.4% faster |
| Price per 1M tokens (in / out) | $1.75 / $14.0 | $5.00 / $30.0 | |
| Input modalities | Not reported | Not reported |
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-3-codex/gpt-5-5-medium · Markdown: /api/v1/compare/gpt-5-3-codex/gpt-5-5-medium?format=md · llms.txt · agent skill