qwen3.5-397b-a17b vs grok-4-fast-chat

Direct benchmark comparison between qwen3.5-397b-a17b and grok-4-fast-chat based on LMArena Elo and latest API pricing.

Direct Technical Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
qwen3.5-397b-a17b	1449	$3.9e-7	41
grok-4-fast-chat	1421	$2e-7	164

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

Conclusion: For developers looking for higher intelligence, qwen3.5-397b-a17b currently leads with an Elo of 1449.