DeepSeek-V4.1-Flash-20261017 (Max) vs Kimi K3.1 Pro (Max) Benchmark Comparison

Direct benchmark comparison between DeepSeek-V4.1-Flash-20261017 (Max) and Kimi K3.1 Pro (Max) based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
DeepSeek-V4.1-Flash-20261017 (Max)	1665	$1.5e-7	209
Kimi K3.1 Pro (Max)	1692	$0.000002	35

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

Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 27 points. The choice between them should be driven by specific API features or provider preference. Notably, both models are on the Pareto Frontier, representing a true trade-off between higher intelligence and lower cost.