GPT-6.1 Terra (Max) vs Hy4 preview Benchmark Comparison

Direct benchmark comparison between GPT-6.1 Terra (Max) 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
GPT-6.1 Terra (Max)	1671	$0.000001	68
Hy4 preview	1631	$8.34e-7	45

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

Comparison Summary: GPT-6.1 Terra (Max) is the more capable model in this pair, leading by 40 Elo points. Specifically, GPT-6.1 Terra (Max) is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.