This unofficial native MLX affine 5-bit/group-64 checkpoint was independently generated directly from the pinned floating F16 parent orcarouter/Qwen3.8-27B-Uncensored-GGUF@402c3e0a64d77880f55ab096c5b7597ef85162ab. It was not transcoded from another quant and does not use the older FP8-expanded BF16 working representation. This conversion adds no training, fine-tuning, merging, or alignment change.

Source publisher notice — OrcaRouter says

OrcaRouter claims:

An abliterated (refusal-removed) build of Qwen/Qwen3.8-27B, a dense native vision-language model with an MTP speculative-decoding head.

⚠️ Disclaimer — read before use

This model has had its safety alignment substantially removed via abliteration (orthogonalizing the refusal direction out of the residual stream). As a direct consequence:

It will comply with harmful, unethical, offensive, or illegal requests that the original Qwen3.8-27B would refuse. It has no meaningful built-in guardrails.

It is released strictly for legitimate research — interpretability, AI-safety and refusal-mechanism study, red-teaming, robustness evaluation, and controlled experiments.

You assume full responsibility and liability for how you use it and for everything it generates. Do not deploy it to end users or in production without adding your own safety, moderation, and abuse-prevention layers.

Use must comply with the Apache 2.0 License inherited from the base model, and all laws and regulations that apply to you.

The authors and uploaders accept no liability for any misuse or harm arising from this model. Its outputs do not reflect the views of the uploaders or of Qwen / Alibaba.

By downloading or using this model you acknowledge and accept the above.

These are the source publisher's claims and warnings. This conversion has not independently revalidated refusal-removal, quality, safety, benchmark, or behavioral claims.

Direct floating source and precision audit

Source: orcarouter/Qwen3.8-27B-Uncensored-GGUF@402c3e0a64d77880f55ab096c5b7597ef85162ab, two F16 GGUF shards plus mmproj-Qwen3.8-27B-Uncensored-f16.gguf.

Sampled text and formerly quantized MTP matrices did not lie on the old FP8×scale lattice, establishing higher-precision pre-FP8 values in those samples. A dense mtp.fc.weight sample was exactly the old BF16 values stored as F16. A sampled vision-projector BF16 matrix was byte-identical to the old source-derived BF16 matrix despite the new projector's f16 filename. The projector's two distinct GGUF patch-embedding tensors are ordered temporal slices; both are stacked before the native MLX channels-last transpose, reconciling 334 physical mmproj tensors to 333 native vision tensors without dropping either slice. These audits establish precision lineage, not an intelligence gain.

Model tree

text

Qwen/Qwen3.8-27B
└── orcarouter/Qwen3.8-27B-Uncensored-GGUF@402c3e0a64d77880f55ab096c5b7597ef85162ab (F16 parent)
    └── chimingw/Qwen3.8-27B-Uncensored-OrcaRouter-MLX-5bit

GGUF is the upstream container of the newly released floating weights; this child is a native MLX package reconstructed from those floating tensors.

MLX storage avoids an unnecessary pre-quantization loss: F16 tensors remain F16 (including the two unquantized token-embedding and MTP-fc tensors), BF16 tensors retain their raw BF16 bytes, and eligible F16/BF16 matrices are quantized directly in that source dtype. A source F32 dense tensor is stored as BF16 only when a full-value BF16-cast→F32 bit comparison reproduces every finite value exactly; otherwise it remains F32. The expected promoted tensors, including both temporal patch slices, are old BF16-lattice values and therefore round-trip losslessly.

The recursively validated package contains 1199 logical tensors: 504 eligible matrices encoded as native MLX affine 5-bit/group-64 weights, and 695 dense tensors retained in their source-derived F16/BF16/F32 contract. The package contains 2207 physical tensors totaling 21,446,863,360 tensor-payload bytes.

must be replaced with the final recursively validated counts. The required M4 Pro gates exercise this mixed F16/BF16/F32 package.

Integrity and release gates

Pinned source files

File	Bytes	SHA-256
Qwen3.8-27B-Uncensored-F16-00001-of-00002.gguf	27,908,108,288	`578926d4e6d94281e95a48d8e154c4667061a669e9016f2aa2b15101ab4363dc`
Qwen3.8-27B-Uncensored-F16-00002-of-00002.gguf	26,749,625,920	`c15e78454caec46b19dae22fa6915a9e77b917e7cceffdc64c265801f4eaa1f1`
mmproj-Qwen3.8-27B-Uncensored-f16.gguf	931,145,984	`add205b7bfdb3f71f6da36b0a82aa20928dd829a920878c602628cdfbebc5288`

Published model shards

File	Bytes	SHA-256
model-00001-of-00005.safetensors	4,868,235,736	`da8940d2d1d3eb1f8a0013152783e804c86d18beba54cd60598d5686fd662430`
model-00002-of-00005.safetensors	4,887,209,992	`9251b9d11bed21fe2e75630ebc963a4d783be8566832520ac42a39fb0e049fc4`
model-00003-of-00005.safetensors	4,865,140,024	`af2c50f96477d5b1a12839ef36e75c63e993b7dfac52969a4b4f5e694657f635`
model-00004-of-00005.safetensors	4,883,581,784	`737752cd777d9dea18c9b541443862cc325516e149230aabab62b96243023a4a`
model-00005-of-00005.safetensors	1,942,977,248	`650868b1769a9df64af1148acb86dd2cf16773e55ebc7743b14c59a90bf059e7`

Artifact manifest: /workspace/orcarouter-f16/work/release/MLX-5bit/ARTIFACT-MANIFEST.json — 4a948cee47dc6e365e26ddc74296932ece9bf837393f09cbe2467b84c9e65333.

M4 Pro runtime

Validated sequentially on Mac M4 Pro with 48 GiB unified memory, macOS 26.6.1, runtime mlx-serve-26.8.7|mlx-0.32.0|mlx-c-fba4470b8907|llama.cpp-b10034. Text determinism, chat-template tool calling, image-grounded vision (red), and clean unload all passed. MTP-off produced zero draft tokens in 10.150830s; MTP-on drafted 66 tokens and accepted 66 in 6.809538s. The matched output SHA-256 was 65966537023045093dda6a4bf49057afef35319d2f5170c68435d3330c8cec10 in both modes. Durations are bounded smoke-test evidence, not performance benchmarks.

Bounded matched fidelity

Model	Perplexity	Tokens
old-fp8-derived-Q4_K_M	5.8034	2048
new-f16-derived-Q4_K_M	5.7962	2048
old-fp8-derived-Q5_K_M	5.7901	2048
new-f16-derived-Q5_K_M	5.7774	2048
old-fp8-derived-Q6_K	5.8586	2048
new-f16-derived-Q6_K	5.8034	2048
old-fp8-derived-Q8_0	5.7958	2048
new-f16-derived-Q8_0	5.8195	2048

Fidelity report: /workspace/orcarouter-f16/work/fidelity-v2/FIDELITY-REPORT.json — 9774c9205abac6feb2ff8759627dc5b2087e703d7141f42a658432a92de02e0d.

Machine-readable release evidence

The JSON below is the fail-closed release contract. It intentionally excludes README/self-manifest hashes to avoid circular evidence.

json

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        "run_2_output_sha256": "2f2d059139883d9985ea4178113bf6ac4fa731a1b72ab0be2608a3a279411144"
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      "mtp_off": {
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        "passed": true,
        "speculative_decoding_enabled": false
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      "mtp_on": {
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        "passed": true,
        "speculative_decoding_enabled": true
      },
      "text": {
        "passed": true
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      "tool": {
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      "vision": {
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    "hardware": {
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The bounded WikiText-2 comparison is quantization-fidelity evidence, not an intelligence benchmark. Throughput depends on hardware, context, prompt, and runtime. M4 Pro load/generation tests must cover MTP off and on before publication.

Legacy release history

The prior public revision was quantized from an FP8-expanded BF16 working representation. That historical lineage does not describe this replacement.