GLM-5.3-Flash-oQ4e-mtp

Updated 2026-10-24: Re-quantized with Better Low-Bit oQ. Please re-download if you have an earlier copy.

This model was quantized using oQ (oMLX v0.7.3.dev1) mixed-precision quantization with Better Low-Bit oQ (jundot/omlx#4776).

A mixed-precision MLX checkpoint of zai-org/GLM-5.3-Flash, a natively multimodal mixture-of-experts model with 320B total and 18B active parameters that combines sparse and linear attention with Manifold-Constrained Hyper-Connections (mHC). It includes the language model, the vision encoder and the multi-token prediction (MTP) head.

The effective average is 4.641 bits/weight for the complete checkpoint.

Quantization and Bit Distribution

oQ4e allocates bits by measured layer sensitivity, then rounds each group with an importance matrix (128 samples x 512 tokens) and a weighted least-squares refit of its scale and bias.

Storage format Logical weights Share of total Tensor storage Effective bits/weight
Affine 4-bit, group 64 311.654B 96.991% 163.266 GiB 4.50
Affine 8-bit, group 64 8.976B 2.793% 8.882 GiB 8.50
BF16 0.607B 0.189% 1.131 GiB 16.00
FP32 0.086B 0.027% 0.322 GiB 32.00
Total 321.323B 100% 173.600 GiB 4.641

Storage Breakdown

Component Logical weights Storage
Language backbone 313.327B 180.966 GB / 168.538 GiB
Vision encoder 0.564B 1.127 GB / 1.050 GiB
MTP head 7.433B 4.309 GB / 4.013 GiB
Total 321.323B 186.402 GB / 173.600 GiB

License

MIT, following the source model. See LICENSE.

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