Muse Glimmer 30B MLX MXFP8

Staging status: tensor integrity is verified, but inference did not complete on the tested 32 GB host because Metal ran out of memory. This artifact is prepared for validation on a higher-memory Apple Silicon host and is not release-ready yet.

An MLX-VLM MXFP8 conversion of meta-models/Muse-Glimmer-30B, developed by Meta Superintelligence Lab. The conversion is pinned to source revision 97c77dff50b2797bcc558fa2d909761dbc575c59.

Model details

Property Value
Architecture Dense causal transformer with a dedicated perception encoder
Parameters Approximately 29.8B total, including an approximately 1.8B vision encoder
Modalities Text and image input; text output
Context length 131,072+ architecture limit documented upstream; not validated here
Quantization RTN mxfp8, 8-bit, group size 32
Quantization scope Eligible language and bridge linear layers; vision_tower remains unquantized
Artifact size Approximately 32.53 GB
Release status Staging; higher-memory inference validation required

Requirements for the next test

  • Apple Silicon with 64 GB or more unified memory is the next recommended validation target. This is a test recommendation, not a verified minimum.
  • Approximately 34 GB of disk space for the model, plus runtime and swap space.
  • macOS, Python 3.13, and the pinned MLX-VLM runtime below.
pip install "mlx-vlm @ git+https://github.com/Blaizzy/mlx-vlm.git@132fc5dea46a085f39400cb101d1ad7c1dabdd49"

Test commands

Text

mlx_vlm.generate \
  --model bsisduck/Muse-Glimmer-30B-MLX-MXFP8 \
  --prompt "Return only the result of 84 * 3 / 2." \
  --max-tokens 48 --temperature 0

Image

mlx_vlm.generate \
  --model bsisduck/Muse-Glimmer-30B-MLX-MXFP8 \
  --image ./image.jpg \
  --prompt "Describe this image and identify the important details." \
  --max-tokens 128 --temperature 0

Validation status

Check Result
Conversion Passed; bounded 2 GiB serialization, 30.06 seconds
Serialized tensor comparison Passed; 1857/1857 tensors exactly match the pinned MXFP8 reference
Local-to-remote transfer Passed; 24 files match SHA-256 manifest digest 65ec5c8d4e12879e397f9f662cb6410360b5a4e4ade24e01b9afd3badeb9e25b
Text smoke on 32 GB Not completed; Metal out of memory
Vision smoke on 32 GB Not started because the text gate did not pass

The failed smoke attempt reported a 30997 MB model requirement against a 25559 MB recommended runtime limit. It does not indicate corrupted weights: the independent tensor audit matched every serialized tensor.

Limitations and safety

  • No inference-quality, throughput, long-context, or DFlash claim is made for this staging artifact.
  • Quantization can change model outputs relative to BF16 even when serialized tensors exactly match another MXFP8 conversion.
  • The model can produce inaccurate, biased, unsafe, or objectionable output.
  • Read the upstream model card and USAGE_POLICY.md before deployment.

Staging evidence

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