deepseek-v3.1 vs gpt-5-chat

Direct benchmark comparison between deepseek-v3.1 and gpt-5-chat based on LMArena Elo and latest API pricing.

Direct Technical Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
deepseek-v3.1	1418	$1.5e-7	11
gpt-5-chat	1426	$0.00000125	101

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

Conclusion: For developers looking for higher intelligence, gpt-5-chat currently leads with an Elo of 1426.