Claude Opus 5 (Max) vs Muse Spark Open (Max) Benchmark Comparison

Direct benchmark comparison between Claude Opus 5 (Max) and Muse Spark Open (Max) based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
Claude Opus 5 (Max)	1490	$0.000005	66
Muse Spark Open (Max)	1511	$0.00000125	107

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

Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 21 points. The choice between them should be driven by specific API features or provider preference. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate Hy4 preview, which offers a superior benchmark-to-price ratio.