GLM-5.3-Flash W4A16 NVFP4

An NVIDIA ModelOpt W4A16 NVFP4 checkpoint of

zai-org/GLM-5.3-Flash-BF16.

The main-model routed experts use NVFP4 weights with group size 16 and BF16

activations. Attention, shared experts, routers, embeddings, output head, and

MTP weights retain their source precision.

This repository contains the Hugging Face checkpoint, not GGUF. A runtime with

support for this ModelOpt W4A16 NVFP4 architecture is required.

The original model's MIT license is included. Architecture, usage, chat format,

and limitations are documented in the

official model card.