DeepSeek-V4.1-Flash-1017-oQ2.5e-ngram-mtp

N-gram (Engram) tables are kept at the original FP8 precision. All other weights match DeepSeek-V4.1-Flash-1017-oQ2.5e-mtp, so resident memory is the same with Engram SSD offload.

This model was quantized using oQ (oMLX v0.7.1) mixed-precision quantization with Improved oQe Quantization (jundot/omlx#4385).

A mixed-precision MLX checkpoint of deepseek-ai/DeepSeek-V4.1-Flash-1017, a minor update to DeepSeek-V4.1-Flash with improved reasoning, coding, agentic and visual performance. It is a multimodal mixture-of-experts model with 552B backbone parameters, a Causal Encoder-Decoder layout, Compressed Sparse Attention 2 (CSA2), Engram conditional memory and DSpark speculative decoding. It includes the language model, the Engram tables, the vision encoder, the multimodal aligner and the DSpark MTP weights.

The effective average is 3.104 bits/weight excluding the Engram tables, or 4.430 bits/weight for the complete checkpoint.

Quantization and Bit Distribution

oQ2.5e allocates bits by measured layer sensitivity, then rounds each group with an importance matrix (1024 samples x 512 tokens) and a weighted least-squares refit of its scale and bias. The Engram tables keep the original FP8 storage, E4M3 values with one E8M0 scale per 32 channels, and are left out of the bit budget because oMLX can serve them from SSD instead of memory.

Storage format	Logical weights	Share of total	Tensor storage	Effective bits/weight
Affine 2-bit, group 64	308.030B	40.360%	89.648 GiB	2.50
Affine 3-bit, group 64	235.552B	30.864%	95.977 GiB	3.50
MXFP4, group 32	13.590B	1.781%	6.724 GiB	4.25
Affine 8-bit, group 64	5.200B	0.681%	5.145 GiB	8.50
MXFP8, group 32	0.779B	0.102%	0.748 GiB	8.25
BF16	3.399B	0.445%	6.332 GiB	16.00
FP32	0.042B	0.006%	0.158 GiB	32.00
Engram MXFP8, group 32	196.614B	25.762%	188.833 GiB	8.25
Total	763.205B	100%	393.564 GiB	4.430

Storage Breakdown

Component	Logical weights	Storage
Language backbone	551.881B	210.811 GB / 196.333 GiB
Engram tables	196.614B	202.758 GB / 188.833 GiB
Vision encoder	0.485B	0.971 GB / 0.904 GiB
MTP head	14.225B	8.047 GB / 7.495 GiB
Total	763.205B	422.587 GB / 393.564 GiB

License

MIT, following the source model. See LICENSE.