Claude Opus 5.5 (High, Default Fallback) vs gpt-oss-20b (Low)

Claude Opus 5.5 (High, Default Fallback) vs gpt-oss-20b (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-20b (Low)Not ranked · benchmark data missing
Intelligence
10.00
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-20b (Low)Difference
Intelligence (higher is better)53.610.0−81.3% gpt-oss-20b (Low) is 81.3% less intelligent
Total AA cost (lower is better)$2,172.43Not reported— not comparable
End-to-end time (lower is better)39.33s12.88s−67.3% gpt-oss-20b (Low) is 67.3% faster
Price per 1M tokens (in / out)$4.00 / $20.0$0.07 / $0.30
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Opus 5.5 (High, Default Fallback): what beats itgpt-oss-20b (Low): 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-5-5-high/gpt-oss-20b-low · Markdown: /api/v1/compare/claude-opus-5-5-high/gpt-oss-20b-low?format=md · llms.txt · agent skill