claude-sonnet-5.5-high vs gpt-5.4-high Benchmark Comparison

Direct benchmark comparison between claude-sonnet-5.5-high and gpt-5.4-high based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-sonnet-5.5-high	1699	$0.000002	102
gpt-5.4-high	1475	$0.0000025	42.5

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

Comparison Summary: claude-sonnet-5.5-high is the more capable model in this pair, leading by 224 Elo points.