AX-DeepSeek-V4-Pro-0813-MLX-AXQ-2bit-MTP
Experimental AXQ 2-bit MLX pack of
deepseek-ai/DeepSeek-V4-Pro-0813.
Not certified. Will not be certified in this revision. Layer-stack SSD expert paging is too slow for practical serving, so this pack is a hobby / curiosity artifact: a 1.6T-class DeepSeek V4 Pro MoE that can exist on a Mac only because experts are paged from disk. If that sounds fun, enjoy. If you need something you can actually work with, use a smaller certified AXQ pack (Qwen 3.6, Flash, Coder-Next, GPT-OSS). No AXQ 4-bit sibling will be published for this base.
This card is convert evidence, not a quality or speed claim. Quality vs BF16 / FP8 was not measured.
This is an AXQuant pack (deepseek-v4-v1), not mlx-optiq. Do not load
OptiQ DeepSeek repos in AX Engine.
Full convert notes: docs/deepseek-v4-pro-0813-axq-2bit.md.
Why it is slow
The full expert table does not fit in unified memory on any shipping Mac
(512 GB is still too small). AX Engine pages one fused expert layer at a
time (ax_expert_stream.json, required=true). Every token waits on SSD
I/O for routed experts. That is why this revision is not a product path.
You still need AX_ENGINE_2BIT_EXPERIMENTAL=1.
Do not mlx_lm.load this pack as a fully resident model.
Recipe
Affine, group size 32
(deepseek-v4-pro-0813-experimental-2bit-v0.1.yaml):
| Role | Bits |
|---|---|
| Expert, attention, shared MLP | 2 |
Embedding, router (ffn.gate) | 8 |
| Norms, LM head | 16 (BF16) |
| DSpark / MTP | 16, byte-preserved into mtp.safetensors |
Source: official mixed FP4+FP8 revision 72e1d3230f6c080a530b0a1d46f8eb4602340597.
Convert uses the AXQuant stream backend because mlx_lm.load cannot ingest
that snapshot. DSpark speculative decode is packaged, not enabled. Stock
MLX-LM can see the text backbone; AX Engine keeps uncertified MTP on direct
decode.
Status
| Item | Status |
|---|---|
Convert + ax_expert_stream.json | Factory job on df-macstudio-m2 |
| Convert git SHA | 2f4e4e49b82463ac9e146090020a9565c8583253 |
| License | Upstream DeepSeek LICENSE copied into the pack |
| Hub weights | Uploaded after convert |
| Quality vs BF16 / FP8 | Not measured |
| AX Engine cert | Will not certify this revision (too slow to be practical) |
| MTP present | Native mtp.safetensors sidecar (DSpark under mtp.*) |
| MTP / DSpark acceleration | Not claimed |
Hobby use only. Not a supported product pack.