clef-flash-oQ2.5e

Updated 2026-10-29: Re-quantized with the improved oQe quantization in oMLX 0.7.3. Please re-download if you have an earlier copy.

This model was quantized using oQ (oMLX v0.7.3) mixed-precision quantization with improved oQe (jundot/omlx#4930).

A mixed-precision MLX checkpoint of Cloudflare/clef-flash, a 9B decision model post-trained from Qwen/Qwen3.5-9B that turns a state and a schema of typed questions into decisions, returning a probability for every allowed option of every question in a single forward pass. It includes the Qwen3.5-9B language backbone, the vision encoder and the joint schema head.

The joint schema head (joint_head.safetensors, joint_head_config.json) is copied unchanged from the source. oMLX serves this checkpoint through POST /v1/systemone.

The effective average is 3.418 bits/weight for the language backbone and 4.181 bits/weight for the complete checkpoint.

Quantization and Bit Distribution

oQ2.5e allocates bits by measured layer sensitivity, then rounds each group with an importance matrix (128 samples x 512 tokens) and a weighted least-squares refit of its scale and bias.

Storage format Logical weights Share of total Tensor storage Effective bits/weight
Affine 2-bit, group 64 2.606B 27.336% 0.758 GiB 2.50
Affine 3-bit, group 128 3.910B 41.024% 1.479 GiB 3.25
Affine 3-bit, group 64 1.017B 10.671% 0.414 GiB 3.50
Affine 5-bit, group 64 1.420B 14.895% 0.909 GiB 5.50
BF16 0.579B 6.073% 1.078 GiB 16.00
Total 9.532B 100% 4.639 GiB 4.181

Storage Breakdown

Component Logical weights Storage
Language backbone 8.954B 3.826 GB / 3.563 GiB
Vision encoder 0.456B 0.912 GB / 0.849 GiB
Joint schema head 0.122B 0.244 GB / 0.227 GiB
Total 9.532B 4.982 GB / 4.639 GiB

License

Apache-2.0, following the source model. See LICENSE.

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