o3-2025-04-16 vs grok-4-fast-chat

Direct benchmark comparison between o3-2025-04-16 and grok-4-fast-chat based on LMArena Elo and latest API pricing.

Direct Technical Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
o3-2025-04-16	1431	$0.000002	51
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, o3-2025-04-16 currently leads with an Elo of 1431.