muse-spark-1.2 (xHigh) vs grok-4.5 Benchmark Comparison

Direct benchmark comparison between muse-spark-1.2 (xHigh) 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
muse-spark-1.2 (xHigh)	1500	$0.00000125	118
grok-4.5	1468	$0.000002	54

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

Comparison Summary: muse-spark-1.2 (xHigh) is the more capable model in this pair, leading by 31 Elo points. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate hy4-preview, which offers a superior benchmark-to-price ratio.