claude-opus-4-1-20250805 vs grok-4-fast-chat

Direct benchmark comparison between claude-opus-4-1-20250805 and grok-4-fast-chat based on LMArena Elo and latest API pricing.

Direct Technical Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
claude-opus-4-1-20250805	1447	$0.000015	N/A
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, claude-opus-4-1-20250805 currently leads with an Elo of 1447.