claude-opus-5.5-max vs gpt-6-luna-max Benchmark Comparison

Direct benchmark comparison between claude-opus-5.5-max and gpt-6-luna-max based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-5.5-max	1818	$0.000004	58
gpt-6-luna-max	1593	$1e-7	74

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

Comparison Summary: claude-opus-5.5-max is the more capable model in this pair, leading by 225 Elo points. Notably, both models are on the Pareto Frontier, representing a true trade-off between higher intelligence and lower cost.