gemini-3.5-flash vs glm-5.1 Benchmark Comparison

Direct benchmark comparison between gemini-3.5-flash 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
gemini-3.5-flash	1480	$0.0000015	118
glm-5.1	1472	$9.8e-7	30

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

Comparison Summary: These models are highly competitive, with a negligible Elo gap of only 8 points. The choice between them should be driven by specific API features or provider preference. Specifically, gemini-3.5-flash is currently on the Pareto line, suggesting it offers better systemic value for its performance tier.