claude-sonnet-4-5-20250929 vs muse-spark-1.1 Benchmark Comparison

Direct benchmark comparison between claude-sonnet-4-5-20250929 and muse-spark-1.1 based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-sonnet-4-5-20250929	1455	$0.000003	40
muse-spark-1.1	1493	$0.00000125	94

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

Comparison Summary: muse-spark-1.1 is the more capable model in this pair, leading by 38 Elo points.