Lumix-4B

Lumix-4B is a compact, vision-capable coding and reasoning model from Blackfrost, distributed as GGUF quantizations for llama.cpp and Ollama. It is a fine-tune of Qwen3.5-4B, tuned to drive the Shadow coding agent well above its size.

  • Base: Qwen/Qwen3.5-4B (GGUF architecture qwen35)
  • Parameters: ~4B
  • Modalities: text + vision (image input via the bundled mmproj)
  • Context: long-context, agentic coding — one clean tool call at a time, look → act → verify

Files

File Quant Notes
Lumix-4B-Q3_K_M.gguf Q3_K_M smallest
Lumix-4B-Q4_K_M.gguf Q4_K_M recommended
Lumix-4B-Q5_K_M.gguf Q5_K_M
Lumix-4B-Q6_K.gguf Q6_K
Lumix-4B-Q8_0.gguf Q8_0 near-lossless
Lumix-4B-f16.gguf F16 full precision
Lumix-4B-mmproj.gguf vision projector (pair with any quant for image input)

Usage

llama.cpp

llama-cli -hf Blackfrost-AI/Lumix-4B:Q4_K_M
# vision: also pass --mmproj Lumix-4B-mmproj.gguf and an --image

Ollama

ollama run hf.co/Blackfrost-AI/Lumix-4B:Q4_K_M

License

Released under the Apache-2.0 license.

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