muse-spark-1.1 vs grok-4.20-beta-0309-reasoning Benchmark Comparison

Direct benchmark comparison between muse-spark-1.1 and grok-4.20-beta-0309-reasoning based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
muse-spark-1.1	1493	$0.00000125	94
grok-4.20-beta-0309-reasoning	1473	$0.00000125	131

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

Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 20 points. The choice between them should be driven by specific API features or provider preference.