Claude Opus 5 (Adaptive Reasoning, Medium Effort) vs GPT-5.2 Codex (xhigh)
Claude Opus 5 (Adaptive Reasoning, Medium Effort) vs GPT-5.2 Codex (xhigh). 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 | Claude Opus 5 (Adaptive Reasoning, Medium Effort) | GPT-5.2 Codex (xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 45.1 | 28.5 | −36.8% GPT-5.2 Codex (xhigh) is 36.8% less intelligent |
| Total AA cost (lower is better) | $2,731.91 | Not reported | — not comparable |
| End-to-end time (lower is better) | 13.90s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $1.75 / $14.0 | |
| 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/claude-opus-5-medium/gpt-5-2-codex · Markdown: /api/v1/compare/claude-opus-5-medium/gpt-5-2-codex?format=md · llms.txt · agent skill