---
license: apache-2.0
library_name: mlx
base_model: Zyphra/ZAYA1-VL-8B
base_model_relation: quantized
pipeline_tag: image-text-to-text
tags:
  - zaya
  - mixture-of-experts
  - hybrid-attention
  - cca-attention
  - mlx
  - apple-silicon
  - reasoning
  - tool-use
  - quantized
  - vision
  - multimodal
  - image-text-to-text
  - vision-language
  - qwen2_5_vl-vit
  - mxfp4
  - jang
  - osaurus
quantization_config:
  family: mxfp4
  profile: MXFP4
  group_size: 32
  expert_layout: split_switch_mlp
---

<p align="center"><img src="osaurus-x-banner.png" width="100%" alt="OsaurusAI"/></p>

# ZAYA1-VL-8B-MXFP4

Quantized **Zyphra/ZAYA1-VL-8B** for Apple Silicon runtimes.

| | |
|---|---|
| Source | [Zyphra/ZAYA1-VL-8B](https://huggingface.co/Zyphra/ZAYA1-VL-8B) |
| License | Apache-2.0, inherited from upstream |
| Format | MXFP4 |
| Modality | image+text |
| Bundle size | 7.12 GiB |
| Tensor keys | 5315 |
| Expert layout | Pre-stacked `zaya_block.experts.switch_mlp` |
| Runtime status | Generation coherence: NOT INDEPENDENTLY PASSED for the quantized runtime bundle (missing coherence report); published as a format/runtime bundle pending downstream ZAYA runtime validation. |

## Important Runtime Note

This bundle requires a ZAYA-aware MLX/JANG runtime that implements CCA attention state and the converted pre-stacked expert layout.

ZAYA1-VL fuses Zyphra's text-ZAYA decoder (CCA attention + top-1 MoE) with the Qwen2.5-VL vision tower. Vision-LoRA modulates the LM trunk only at vision-token positions; text positions decode unmodified. Use this bundle only with a runtime that implements the ZAYA CCA state contract and the converted pre-stacked expert layout.

## Runtime Pin Required

Zyphra `model_type=zaya1_vl` is not yet implemented in `vmlx-swift-lm` or stock `mlx_vlm`. The bundle is **conversion-ready and structurally verified** but image-text decoding requires either:

- Zyphra's `transformers @ git+https://github.com/Zyphra/transformers.git@zaya1-vl` fork (BF16 source-side reference), or
- A `Zaya1VL` MLX adapter (in development at `jang-runtime/Sources/JANG/Zaya1VL/`).

Until the MLX adapter ships, treat this bundle as a runtime-pending preview.


## Architecture Summary

- 40 hybrid decoder layers: each layer has CCA attention + top-1 MoE
- Hidden size 2048, 8 query heads, 2 KV heads, head dim 128
- 16 routed experts per MoE layer, top-1 routing
- Vision tower: Qwen2.5-VL ViT (`hidden=1280`, `out=2048`, `patch=14`)
- Vision-LoRA on the LM trunk: rank-8 attn, rank-32 MLP, gated to vision tokens only
- Image tokens: `image_token_id=262147`, start=255999, end=256000
- Context length 32768, `rope_theta=1000000`, partial RoPE (0.5 of head dim)

## Quantization

4-bit affine LM linears + 8-bit embeddings + passthrough vision tower / LoRA / router / CCA state.

Passthrough floor for first release prep:

- `conv_qk.*`, `temp`, norms, residual scaling, router path, biases, and balancing biases are preserved as float tensors.
- Embeddings and `lm_head` use 8-bit affine in the prepared bundles.
- Vision tower (`vision_tower.*`) and all LoRA tensors (`*.lora_*.[01].weight`) are kept in float passthrough.
- `jangtq_runtime.safetensors` is not applicable to MXFP4.

`mxtq_bits`:

```json
null
```

## Bundle Verification

- Safetensor headers scanned.
- Source tensor coverage checked.
- Converted bundles checked for `local_experts` removal.
- Converted expert tensors checked for pre-stacked `switch_mlp` layout.
- JANGTQ sidecars checked for the Swift runtime contract.
- Vision tower + LoRA tensors verified passthrough; image_token_id, vision_start/end preserved.
- Runtime coherence status recorded above.

## Runtime Smoke Tests

Before production use, run short deterministic prompts through the exact target runtime:

- `What is 2+2? Answer with only the number.`
- `What is the capital of France? Answer with one word.`
- One chat-template prompt with thinking disabled.
- One image+text prompt exercising vision-token interleave and the vision-LoRA gate.

The first public bundle release records bundle integrity and runtime contract checks. Full generation quality depends on a ZAYA-aware runtime implementation.

## Korean Summary

이 번들은 Zyphra/ZAYA1-VL-8B를 Apple Silicon MLX/JANG 런타임용으로 양자화한 모델입니다. ZAYA의 CCA attention 상태와 MoE 라우팅을 정확히 구현한 런타임에서만 사용해야 합니다. 이미지 입력은 Qwen2.5-VL ViT 경로를 거치며, vision-LoRA는 이미지 토큰 위치에서만 적용됩니다.

## Files

- `config.json` carries `weight_format=mxfp4`, `zaya_expert_layout=split_switch_mlp`, and a preserved `vision_config`.
- `jang_config.json` carries `cache_subtype=zaya_cca`.
- Tokenizer files and chat template are preserved from the upstream source snapshot.
- `preprocessor_config.json` (Qwen2VLImageProcessor) is included for image input.