deepseek-v4-flash-thinking vs gemini-3.1-pro-preview Benchmark Comparison

Direct benchmark comparison between deepseek-v4-flash-thinking and gemini-3.1-pro-preview 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	1439	$1.4e-7	48
gemini-3.1-pro-preview	1493	$0.000002	85

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

Comparison Summary: gemini-3.1-pro-preview is the more capable model in this pair, leading by 54 Elo points. Specifically, gemini-3.1-pro-preview is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.