claude-sonnet-4-5-20250929 vs hy3 Benchmark Comparison

Direct benchmark comparison between claude-sonnet-4-5-20250929 and hy3 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	56
hy3	1527	$1.4e-7	60

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

Comparison Summary: hy3 is the more capable model in this pair, leading by 72 Elo points. Specifically, hy3 is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.