claude-fable-5-high vs claude-haiku-5.5-high Benchmark Comparison

Direct benchmark comparison between claude-fable-5-high and claude-haiku-5.5-high 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-high	1504	$0.00001	14
claude-haiku-5.5-high	1587	$1e-7	185

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

Comparison Summary: claude-haiku-5.5-high is the more capable model in this pair, leading by 83 Elo points. Specifically, claude-haiku-5.5-high is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.