Claude Opus 4.5 (Reasoning) vs gpt-oss-20b (High)

Claude Opus 4.5 (Reasoning) 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.

AnthropicClaude Opus 4.5 (Reasoning)Not ranked · benchmark data missing
Intelligence
29.10
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.

MetricClaude Opus 4.5 (Reasoning)gpt-oss-20b (High)Difference
Intelligence (higher is better)29.19.0−69.1% gpt-oss-20b (High) is 69.1% less intelligent
Total AA cost (lower is better)Not reported$28.81— not comparable
End-to-end time (lower is better)22.98s15.12s−34.2% gpt-oss-20b (High) is 34.2% faster
Price per 1M tokens (in / out)$5.00 / $25.0$0.05 / $0.22
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Opus 4.5 (Reasoning): what beats itgpt-oss-20b (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/claude-opus-4-5-thinking/gpt-oss-20b · Markdown: /api/v1/compare/claude-opus-4-5-thinking/gpt-oss-20b?format=md · llms.txt · agent skill