GLM 5.2 vs DeepSeek V4: Which Is Better in 2026

Last week, I was migrating a legacy Python monolith into microservices, and I needed an AI coding agent that could actually hold the entire codebase in its head without choking. I fired up two of the biggest open-weight releases of the year—Zhipu AI's GLM-5.2 and DeepSeek V4 Pro. Both are MIT-licensed, Chinese-developed Mixture-of-Experts (MoE) models. Both now support a massive 1M-token context window. And both are fighting tooth and nail to be