grok-4-1-fast-reasoning vs mimo-v2.5-pro Benchmark Comparison

Direct benchmark comparison between grok-4-1-fast-reasoning and mimo-v2.5-pro based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
grok-4-1-fast-reasoning	1431	$2e-7	94
mimo-v2.5-pro	1465	$0.000001	35

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

Comparison Summary: mimo-v2.5-pro is the more capable model in this pair, leading by 34 Elo points. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate gemini-3.1-pro-preview, which offers a superior benchmark-to-price ratio.