gpt-5.5-high vs gpt-6-luna-max Benchmark Comparison

Direct benchmark comparison between gpt-5.5-high 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
gpt-5.5-high	1482	$0.000005	5.5
gpt-6-luna-max	1593	$1e-7	74

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

Comparison Summary: gpt-6-luna-max is the more capable model in this pair, leading by 111 Elo points. Specifically, gpt-6-luna-max is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.