GPT-5.1 Codex (High) vs gpt-oss-120b (High)

GPT-5.1 Codex (High) vs gpt-oss-120b (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 (High)Not ranked · benchmark data missing
Intelligence
23.70
Total cost
-
OpenAIgpt-oss-120b (High)Off the frontier
Intelligence
11.60
Total cost
$123
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 (High)gpt-oss-120b (High)Difference
Intelligence (higher is better)23.711.6−51.1% gpt-oss-120b (High) is 51.1% less intelligent
Total AA cost (lower is better)Not reported$122.71— not comparable
End-to-end time (lower is better)12.93s11.55s−10.7% gpt-oss-120b (High) is 10.7% faster
Price per 1M tokens (in / out)$1.25 / $10.0$0.15 / $0.60
Input modalitiesText, ImageText
Open this matchup in the interactive pickerGPT-5.1 Codex (High): what beats itgpt-oss-120b (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/gpt-5-1-codex/gpt-oss-120b · Markdown: /api/v1/compare/gpt-5-1-codex/gpt-oss-120b?format=md · llms.txt · agent skill