gemma-4-31b vs grok-4-fast-chat Benchmark Comparison

Direct benchmark comparison between gemma-4-31b and grok-4-fast-chat based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
gemma-4-31b	1451	$1.4e-7	5
grok-4-fast-chat	1421	$2e-7	168

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

Comparison Summary: gemma-4-31b is the more capable model in this pair, leading by 30 Elo points. Specifically, gemma-4-31b is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.