Claude Fable 5.2 (xHigh) vs Hy4 preview Benchmark Comparison

Direct benchmark comparison between Claude Fable 5.2 (xHigh) and Hy4 preview based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
Claude Fable 5.2 (xHigh)	1836	$0.000008	79
Hy4 preview	1632	$8.34e-7	66

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

Comparison Summary: Claude Fable 5.2 (xHigh) is the more capable model in this pair, leading by 204 Elo points. Specifically, Claude Fable 5.2 (xHigh) is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.