claude-sonnet-5.5-high vs muse-spark-1.2 (xHigh) Benchmark Comparison

Direct benchmark comparison between claude-sonnet-5.5-high and muse-spark-1.2 (xHigh) based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-sonnet-5.5-high	1699	$0.000002	102
muse-spark-1.2 (xHigh)	1496	$0.00000125	90

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

Comparison Summary: claude-sonnet-5.5-high is the more capable model in this pair, leading by 203 Elo points.