Claude Opus 5.5 (Low, Default Fallback) vs GPT-5.6 Luna (Max)

Claude Opus 5.5 (Low, Default Fallback) vs GPT-5.6 Luna (Max). 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
34.50
Total cost
$980
OpenAIGPT-5.6 Luna (Max)Not ranked · benchmark data missing
Intelligence
-
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)GPT-5.6 Luna (Max)Difference
Intelligence (higher is better)34.5Not reported— not comparable
Total AA cost (lower is better)$979.66Not reported— not comparable
End-to-end time (lower is better)12.23s123.29s+908.1% GPT-5.6 Luna (Max) is 908.1% slower
Price per 1M tokens (in / out)$4.00 / $20.0$0.20 / $1.20
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude Opus 5.5 (Low, Default Fallback): what beats itGPT-5.6 Luna (Max): 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/gpt-5-6-luna · Markdown: /api/v1/compare/claude-opus-5-5-low/gpt-5-6-luna?format=md · llms.txt · agent skill