GLM 5.3 Flash

Z.AI🇨🇳z-ai/glm-5.3-flash

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GLM-5.3-Flash is Z.ai's first natively multimodal model in the GLM-5 family (320B total parameters, 18B active mixture-of-experts, MIT license, 1M-token context), released August 26, 2026 with a hybrid sparse-plus-linear attention architecture that keeps long-context behavior accurate while cutting compute overhead. It is built for efficient coding and long-horizon agent tasks, outperforming GLM-5.2 at roughly one-tenth the price while approaching flagship-class coding and agentic benchmark performance.