deepseek-v4-flash-thinking vs glm-5.1 Benchmark Comparison

Direct benchmark comparison between deepseek-v4-flash-thinking and glm-5.1 based on LMArena Elo and the latest 2026 API pricing.

Direct Technical & Pricing Comparison

Frontier Model	LMArena Elo	API Cost (1M)	Throughput
deepseek-v4-flash-thinking	1439	$1.4e-7	48
glm-5.1	1470	$0.00000105	34

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

Comparison Summary: glm-5.1 is the more capable model in this pair, leading by 31 Elo points. However, neither model is currently Pareto-optimal. Developers looking for peak efficiency should investigate claude-opus-4-7-thinking, which offers a superior benchmark-to-price ratio.