Variant	Size	Status
cohere-transcribe-arabic-07-2026-MLX-8bit	2.4 GB	public
cohere-transcribe-arabic-07-2026-MLX-6bit	2.0 GB	public
cohere-transcribe-arabic-07-2026-MLX-4bit	1.5 GB	public

Summary

MLX 6bit (affine, 6-bit, group size 64) quantization of CohereLabs/cohere-transcribe-arabic-07-2026 at upstream revision f6902c859bd36604f7eb0d40d17f8d9eebda938e, produced directly from the BF16 safetensors with pipelines.mlx_direct_quantize (majek repo). ~1.8 GiB on disk.

Runtime caveat: this is a weights + config pack published ahead of runtime availability; the cohere_asr encoder-decoder architecture is now supported in mlx-audio (stt/models/cohere_asr); it also runs via the pipelines/cohere_asr_mlx harness (not loadable by mlx-lm/mlx-vlm; clips ≤35s). This variant passed the Lane I audio smoke gate: character error rate 0.0000 vs the MLX-BF16 self-reference on both Arabic gating clips (sample1.wav, sample2.wav; threshold 0.05).

Why this variant

Affine 6-bit, group size 64 — a strong quality/size middle ground below 8-bit.

Reproduce

python -m pipelines.mlx_direct_quantize --model cohere-transcribe-arabic --base-dir /tmp/mlx-direct-release/cohere-transcribe-arabic/base --out-dir /tmp/mlx-direct-release/cohere-transcribe-arabic/6bit --bits 6 --mode affine --group-size 64

Family

All MLX variants of this model ship together:

majentik/cohere-transcribe-arabic-07-2026-MLX-4bit
majentik/cohere-transcribe-arabic-07-2026-MLX-6bit (this repo)
majentik/cohere-transcribe-arabic-07-2026-MLX-8bit

Provenance

Upstream: CohereLabs/cohere-transcribe-arabic-07-2026 @ f6902c859bd36604f7eb0d40d17f8d9eebda938e
Quantization: bits=6, mode=affine, group_size=64 (text tower only)
Toolchain: mlx 0.31.2, huggingface_hub 0.36.2
Full details in PROVENANCE.md in this repo.
Upstream access: gated — CohereLabs/cohere-transcribe-arabic-07-2026 requires requesting and being granted access on the Hub before you can download it directly; this quantized MLX repo carries no such gate.

Smoke verdict

This variant was smoke-gated private-first before publication: downloaded from its private repo, loaded through pipelines.cohere_asr_mlx.model.CohereAsrMLX.from_pretrained, checked for finite decode-step logits, and transcribed against the MLX-BF16 self-reference (the port is verbatim-exact vs torch — BF16 CER 0.0 on both clips — so the MLX-BF16 reference is effectively the torch reference). Only after passing was it flipped public.

clip	CER vs MLX-BF16 reference	threshold	pass
`sample1.wav`	0.0000	0.05	✅
`sample2.wav`	0.0000	0.05	✅

License + attribution

Quantized by majentik from CohereLabs/cohere-transcribe-arabic-07-2026. All rights in the original model remain with its authors.

Upstream declares the Apache License 2.0 via its model-card metadata but ships no LICENSE file, so the canonical license text is reproduced below:

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majentik/cohere-transcribe-arabic-07-2026-MLX-6bit

cohere-transcribe-arabic-07-2026-MLX-6bit

Sibling variants