gemini-3.1-pro-preview vs grok-4.5 Benchmark Comparison

Direct benchmark comparison between gemini-3.1-pro-preview and grok-4.5 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	1486	$0.000002	99
grok-4.5	1572	$0.000002	83

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

Comparison Summary: grok-4.5 is the more capable model in this pair, leading by 86 Elo points.