Claude Opus 5.5 (Low, Default Fallback) vs Llama 3.1 Instruct 405B

Claude Opus 5.5 (Low, Default Fallback) vs Llama 3.1 Instruct 405B. 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 (Low, Default Fallback)Off the frontier
Intelligence
42.30
Total cost
$860
MetaLlama 3.1 Instruct 405BNot ranked · benchmark data missing
Intelligence
7.30
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 (Low, Default Fallback)Llama 3.1 Instruct 405BDifference
Intelligence (higher is better)42.37.3−82.7% Llama 3.1 Instruct 40… is 82.7% less intelligent
Total AA cost (lower is better)$860.33Not reported— not comparable
End-to-end time (lower is better)13.42sNot reported— not comparable
Price per 1M tokens (in / out)$4.00 / $20.0—
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Opus 5.5 (Low, Default Fallback): what beats itLlama 3.1 Instruct 405B: 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-low/llama-3-1-instruct-405b · Markdown: /api/v1/compare/claude-opus-5-5-low/llama-3-1-instruct-405b?format=md · llms.txt · agent skill