[MLX] Any plans for an 8-bit (bits:8) quantized release?

#11
by visualmutation - opened

Hi Accio-Lab team,

I've been able to pull the official bf16 safetensors weights of occamy-1.0 locally without any issues. Thanks for shipping the official MLX 4bit quantized release (bits:4, group_size:64, mode:affine, with 8bit mixed precision on each layer's mlp.gate / shared_expert_gate) — nicely done.

I'd like to check with the team: are there any plans to release an MLX 8bit version (bits:8, affine / ft_group)?

Converting the official bf16 weights to 8bit locally with mlx_lm.convert looks feasible on my side: occamy-1.0 is qwen3_5_moe (40 layers, num_experts=256, num_experts_per_tok=8). Once quantized to 8bit the memory footprint is small, so serving it locally with omlx serve on a Mac Studio (256GB unified memory) is more than comfortable.

If there is no MLX 8bit release planned, I'll finish the 8bit conversion locally, upload it to a HuggingFace repo under my own account, and share the link in this thread with the community.

Thanks!


中文版本 / Chinese version

Hi Accio-Lab 团队,

occamy-1.0 的官方 bf16 safetensors 权重我已经能正常拉到本地了。感谢官方直接发布了 MLX 4bit 量化版本(bits:4, group_size:64, mode:affine,并在每层 mlp.gate / shared_expert_gate 上用了 8bit 混合精度)——做得很清楚。

想跟官方确认一下:是否有计划发布 MLX 8bit 版本(bits:8, affine / ft_group)?

我这边在本地用 mlx_lm.convert 把官方 bf16 权重转成 8bit 是可行的:occamy-1.0 是 qwen3_5_moe(40 层,num_experts=256,num_experts_per_tok=8)。量化到 8bit 后显存占用很小,在 Mac Studio(256GB 统一内存)上用 omlx serve 本地跑推理绰绰有余。

如果官方暂时没有出 MLX 8bit 的计划,我会在本地完成 8bit 转换后,上传到自己名下的 HuggingFace 仓库,并在此帖回复链接与社区分享。

谢谢!

visualmutation changed discussion title from [MLX] 官方是否有计划出 8bit (bits:8) 量化版本? to [MLX] Any plans for an 8-bit (bits:8) quantized release?

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