gemini-3.1-pro-preview vs gemma-4-31b Benchmark Comparison

Direct benchmark comparison between gemini-3.1-pro-preview and gemma-4-31b based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
gemini-3.1-pro-preview	1493	$0.000002	82
gemma-4-31b	1451	$1.3e-7	54

*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 42 Elo points. Notably, both models are on the Pareto Frontier, representing a true trade-off between higher intelligence and lower cost.