Claude Opus 5.5 (High, Default Fallback) vs gpt-oss-120b (Low)

Claude Opus 5.5 (High, Default Fallback) vs gpt-oss-120b (Low). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude Opus 5.5 (High, Default Fallback)On the frontier
Intelligence
53.60
Total cost
$2172
OpenAIgpt-oss-120b (Low)Not ranked · benchmark data missing
Intelligence
10.20
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 5.5 (High, Default Fallback)gpt-oss-120b (Low)Difference
Intelligence (higher is better)53.610.2−81.0% gpt-oss-120b (Low) is 81.0% less intelligent
Total AA cost (lower is better)$2,172.43Not reported— not comparable
End-to-end time (lower is better)39.33s10.13s−74.2% gpt-oss-120b (Low) is 74.2% faster
Price per 1M tokens (in / out)$4.00 / $20.0$0.13 / $0.59
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Opus 5.5 (High, Default Fallback): what beats itgpt-oss-120b (Low): what beats it
Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-high/gpt-oss-120b-low · Markdown: /api/v1/compare/claude-opus-5-5-high/gpt-oss-120b-low?format=md · llms.txt · agent skill