gpt-5.3-chat-latest vs grok-4-fast-chat

Direct benchmark comparison between gpt-5.3-chat-latest and grok-4-fast-chat based on LMArena Elo and latest API pricing.

Direct Technical Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
gpt-5.3-chat-latest	1461	$0.00000175	57
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, gpt-5.3-chat-latest currently leads with an Elo of 1461.