GPT-5.1 Codex mini (High) vs gpt-oss-20b (High)

GPT-5.1 Codex mini (High) vs gpt-oss-20b (High). 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 Codex mini (High)Not ranked · benchmark data missing
Intelligence
20.40
Total cost
-
OpenAIgpt-oss-20b (High)Off the frontier
Intelligence
9.00
Total cost
$28.8
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 Codex mini (High)gpt-oss-20b (High)Difference
Intelligence (higher is better)20.49.0−55.9% gpt-oss-20b (High) is 55.9% less intelligent
Total AA cost (lower is better)Not reported$28.81— not comparable
End-to-end time (lower is better)13.09s16.48s+25.9% gpt-oss-20b (High) is 25.9% slower
Price per 1M tokens (in / out)$0.25 / $2.00$0.05 / $0.22
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.1 Codex mini (High): what beats itgpt-oss-20b (High): what beats it
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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-1-codex-mini/gpt-oss-20b · Markdown: /api/v1/compare/gpt-5-1-codex-mini/gpt-oss-20b?format=md · llms.txt · agent skill