GPT-5.1 (High) vs GPT-5.5 (Medium)

GPT-5.1 (High) 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.

OpenAIGPT-5.1 (High)Not ranked · benchmark data missing
Intelligence
24.70
Total cost
-
OpenAIGPT-5.5 (Medium)Off the frontier
Intelligence
33.80
Total cost
$2095
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-5.1 (High)GPT-5.5 (Medium)Difference
Intelligence (higher is better)24.733.8+36.8% GPT-5.5 (Medium) is 36.8% more intelligent
Total AA cost (lower is better)Not reported$2,095.12— not comparable
End-to-end time (lower is better)28.58s11.17s−60.9% GPT-5.5 (Medium) is 60.9% faster
Price per 1M tokens (in / out)$1.25 / $10.0$5.00 / $30.0
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerGPT-5.1 (High): what beats itGPT-5.5 (Medium): 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-5-1/gpt-5-5-medium · Markdown: /api/v1/compare/gpt-5-1/gpt-5-5-medium?format=md · llms.txt · agent skill