Z
ZAI Language
GLM 5.3-Flash
Natively multimodal coding model with 1M context at flash-tier pricing.
About
GLM-5.3-Flash is the first natively multimodal model in Z.ai's GLM-5 series, a 320B-parameter Mixture-of-Experts design that activates 18B per token. A hybrid attention architecture pairs linear attention for local context with sparse attention and a lightweight indexer for global retrieval, cutting long-context serving cost across its 1M-token window. Trained on a 30T-token multimodal corpus, it reads images, video, and documents alongside code and lands close to flagship-class results on agentic coding benchmarks at a fraction of the price.
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