Claude Sonnet 5 (High) vs GPT-5 Codex (High)

Claude Sonnet 5 (High) vs GPT-5 Codex (High). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude Sonnet 5 (High)Off the frontier
Intelligence
31.70
Total cost
$2086
OpenAIGPT-5 Codex (High)Not ranked · benchmark data missing
Intelligence
24.90
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.

MetricClaude Sonnet 5 (High)GPT-5 Codex (High)Difference
Intelligence (higher is better)31.724.9−21.5% GPT-5 Codex (High) is 21.5% less intelligent
Total AA cost (lower is better)$2,086.04Not reported— not comparable
End-to-end time (lower is better)15.10s13.09s−13.3% GPT-5 Codex (High) is 13.3% faster
Price per 1M tokens (in / out)$2.00 / $10.0$1.25 / $10.0
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude Sonnet 5 (High): what beats itGPT-5 Codex (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/claude-sonnet-5-high/gpt-5-codex · Markdown: /api/v1/compare/claude-sonnet-5-high/gpt-5-codex?format=md · llms.txt · agent skill