LFM3-Omni-2B-Uncensored-MLX-4bit

High-quality 4-bit MLX conversion of OpenIntelligenceNet/LFM3-Omni-2B-Uncensored for Apple Silicon, built with mlx-vlm (0.7.11) and verified for out-of-the-box compatibility with Osaurus (vmlx) and mlx-vlm.

Conversion & Quantization Details

  • Language Backbone (language_model): Preserves the original abliterated weights from OpenIntelligenceNet/LFM3-Omni-2B-Uncensored without re-abliteration:
    • Decoder linear & short-conv projections: 4-bit affine (group_size=32)
    • Tied embed_tokens / lm_head ([128000, 2048]): 6-bit affine (group_size=32) to preserve output logit fidelity (0.99755 logit cosine similarity vs. bfloat16)
    • Attention head gates (self_attn.gate_proj, [16, 2048]): Full bfloat16 precision
  • Multimodal & Audio Modules (Full bfloat16 Precision):
    • Vision Tower (vision_tower + multi_modal_projector)
    • Audio Encoder (audio_tower + audio_projector)
    • Audio Generation (depth_decoder + codebook_embedding)
    • Liquid Audio Codec (audio_tokenizer/model.safetensors)

Usage

1. Osaurus (vmlx)

Import spiderversekid/LFM3-Omni-2B-Uncensored-MLX-4bit directly in Osaurus or place it in ~/MLXModels/spiderversekid/LFM3-Omni-2B-Uncensored-MLX-4bit.

2. mlx-vlm CLI

pip install -U mlx-vlm

Text-only generation:

python -m mlx_vlm.generate \
  --model spiderversekid/LFM3-Omni-2B-Uncensored-MLX-4bit \
  --prompt "Explain what a multimodal omni model can do." \
  --max-tokens 256 \
  --temperature 0.0

Image + Text generation:

python -m mlx_vlm.generate \
  --model spiderversekid/LFM3-Omni-2B-Uncensored-MLX-4bit \
  --image path/to/image.png \
  --prompt "Describe this image in detail." \
  --max-tokens 256 \
  --temperature 0.0
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