deepseek-v4-flash-thinking vs gemini-3.5-flash Benchmark Comparison

Direct benchmark comparison between deepseek-v4-flash-thinking and gemini-3.5-flash based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
deepseek-v4-flash-thinking	1440	$1.12e-7	47
gemini-3.5-flash	1480	$0.0000015	118

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

Comparison Summary: gemini-3.5-flash is the more capable model in this pair, leading by 40 Elo points. Notably, both models are on the Pareto Frontier, representing a true trade-off between higher intelligence and lower cost.