Model Overview
- Base model: thinkingmachines/Inkling-Small
- Architecture: 42-layer multimodal sparse Mixture-of-Experts transformer
- Parameters: 276B total, 12B active
- Input: Text, image, and audio
- Output: Text
- Inference engine: TokenSpeed
- Model optimizer: AMD Quark (
0.12.post1+rocm72.torch2.11)
- Quantized layers: MoE routed experts in transformer layers 3-41
- Weight quantization: OCP MXFP4, static, group size 32
- Activation quantization: OCP MXFP4, dynamic, group size 32
This checkpoint was produced by applying AMD Quark MXFP4 file-to-file quantization to the BF16 Inkling-Small checkpoint. Attention layers, shared experts, router weights, embeddings, normalization layers, multimodal components, MTP weights, and transformer layers 0-2 remain in BF16.
Environment
The quantization was performed on an AMD gfx950 system with the following software:
- GPU: AMD MI350/MI355
- Target graphics version: gfx950
- ROCm: 7.2.1
- Python: 3.12.3
- PyTorch: 2.13.0+rocm7.1
- AMD Quark: 0.12.post1+rocm72.torch2.11
- Safetensors: 0.8.0
Create and activate a dedicated Quark environment:
python3 -m venv ~/.venv-quark
source ~/.venv-quark/bin/activate
Install the required packages:
python -m pip install torch torchvision --index-url https://download.pytorch.org/whl/rocm7.1
python -m pip install amd-quark --extra-index-url https://pypi.amd.com/quark/rocm72/simple
python -m pip install safetensors transformers accelerate tqdm
Model Quantization
The included quantize_quark.py uses Quark's file-to-file flow to process safetensor shards without loading the full BF16 checkpoint into GPU memory. It automatically applies the Inkling-Small exclusion policy and quantizes only routed expert weights in layers 3-41.
python quantize_quark.py \
--model_dir /path/to/Inkling-Small \
--output_dir /path/to/Inkling-Small-MXFP4 \
--quant_scheme mxfp4 \
--file2file_quantization
Deployment
This model can be served with TokenSpeed:
tokenspeed serve \
--model lightseekorg/Inkling-Small-MXFP4 \
--attn-tp-size 1 \
--moe-tp-size 1 \
--max-model-len 81920 \
--max-num-seqs 16 \
--max-prefill-tokens 8192 \
--chunked-prefill-size 8192 \
--gpu-memory-utilization 0.95 \
--disable-cuda-graph-padding \
--trust-remote-code \
--dtype bfloat16 \
--disable-kvstore \
--kvstore-ratio 0 \
--block-size 128 \
--speculative-algorithm MTP \
--speculative-num-steps 3 \
--speculative-eagle-topk 1 \
--speculative-num-draft-tokens 4 \
--host 127.0.0.1 \
--port 22015