Claude Opus 5 (Xhigh) vs GPT-5.1 (High)

Claude Opus 5 (Xhigh) vs GPT-5.1 (High). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude Opus 5 (Xhigh)Off the frontier
Intelligence
49.70
Total cost
$5868
OpenAIGPT-5.1 (High)Not ranked · benchmark data missing
Intelligence
24.70
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 Opus 5 (Xhigh)GPT-5.1 (High)Difference
Intelligence (higher is better)49.724.7−50.3% GPT-5.1 (High) is 50.3% less intelligent
Total AA cost (lower is better)$5,867.76Not reported— not comparable
End-to-end time (lower is better)37.50s32.18s−14.2% GPT-5.1 (High) is 14.2% faster
Price per 1M tokens (in / out)$5.00 / $25.0$1.25 / $10.0
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude Opus 5 (Xhigh): what beats itGPT-5.1 (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-opus-5-xhigh/gpt-5-1 · Markdown: /api/v1/compare/claude-opus-5-xhigh/gpt-5-1?format=md · llms.txt · agent skill