Claude Opus 4.5 (Reasoning) vs DeepSeek V4.1 Flash (Non-reasoning)

Claude Opus 4.5 (Reasoning) vs DeepSeek V4.1 Flash (Non-reasoning). A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

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)DeepSeek V4.1 Flash (Non-reasoning)Difference
Intelligence (higher is better)29.124.7−15.1% DeepSeek V4.1 Flash (… is 15.1% less intelligent
Total AA cost (lower is better)Not reported$238.91— not comparable
End-to-end time (lower is better)25.65s2.61s−89.8% DeepSeek V4.1 Flash (… is 89.8% faster
Price per 1M tokens (in / out)$5.00 / $25.0$0.30 / $1.20
Input modalitiesText, ImageText, Image
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/deepseek-v4-1-flash-non-reasoning · Markdown: /api/v1/compare/claude-opus-4-5-thinking/deepseek-v4-1-flash-non-reasoning?format=md · llms.txt · agent skill