claude-opus-4-5-20251101 vs deepseek-v4-flash-thinking Benchmark Comparison

Direct benchmark comparison between claude-opus-4-5-20251101 and deepseek-v4-flash-thinking based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-4-5-20251101	1469	$0.000005	44
deepseek-v4-flash-thinking	1439	$1.4e-7	48

*These models represent the Pareto Frontier (optimal cost-to-performance).*

Comparison Summary: claude-opus-4-5-20251101 is the more capable model in this pair, leading by 30 Elo points. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate claude-opus-4-7-thinking, which offers a superior benchmark-to-price ratio.