How to use from the
Use from the
Transformers library
# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("text-generation", model="ressl/Ornith-1.5-35B-A3B-uncensored-GGUF")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)
# Load model directly
from transformers import AutoModel
model = AutoModel.from_pretrained("ressl/Ornith-1.5-35B-A3B-uncensored-GGUF", device_map="auto")
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Ornith-1.5-35B-A3B uncensored (GGUF)

Ornith-1.5-35B-A3B uncensored (GGUF)

TL;DR: abliterated Ornith-1.5-35B-A3B (MoE, 3B active) as a GGUF ladder (Q8_0, Q6_K, Q5_K_M, Q4_K_M + mmproj BF16); hard refusals reduced from 586/1120 to 20/1120 (NVFP4 sibling) with the Q4_K_M build measured at 43/1120 on the same 5-dataset cross-eval.

Same abliterated master as the NVFP4 repo, converted with llama.cpp for local use. Built for security research, red-teaming and penetration-testing workflows; it will comply with requests a stock model refuses. Use responsibly.

Facts & figures

Base model ornith-ai/Ornith-1.5-35B-A3B
Method abliteration (1 biprojection pass) + llama.cpp GGUF conversion
Files Q8_0 37.8 GB, Q6_K 29.2 GB, Q5_K_M 25.3 GB, Q4_K_M 21.7 GB, mmproj BF16 0.9 GB
Context length 262,144 tokens (served here with 131,072)
Hardware used 2x NVIDIA RTX PRO 6000 Blackwell 96 GB (SM120)
Toolchain llama.cpp (master, CUDA build), transformers 5.12.1

Note: the BF16 GGUF (71.1 GB) is not uploaded because Hugging Face rejects single files over 50 GB; use the Q8_0 file for near-BF16 quality or ask for a sharded BF16 upload.

Refusal behavior (measured, hard markers only)

Effective refusal rate on 1120 harmful prompts across 5 datasets (temp 0, hard decline phrases in the first 25 words; naive keyword counts are inflated by compliant-with-disclaimer answers and are not the metric here). The NVFP4 column is the sibling repo's artifact on the identical master; aggressive quantization re-amplifies hedged declines (Q4 column).

Eval set Prompts Baseline hard NVFP4 hard Q4_K_M hard
JailbreakBench 100 64 4 6
tulu-harmbench 320 132 6 10
HarmfulQA 300 84 0 1
LLM-LAT 300 226 6 21
mlabonne harmful 100 80 4 5
TOTAL 1120 586 20 43

Coherence of the base master (measured on the NVFP4 sibling): GPQA-Diamond 58.6% (base model 61.1%), needle-in-haystack 1.0 at 32k/65k/131k, tool-call smoke 1.0, KL(base||ablated) median 0.218 (harmless subset 0.110). The underlying BF16 master is effectively refusal-free on the harvest pool (0.4%).

Run it with llama.cpp (validated)

llama-server -m Ornith-1.5-35B-A3B-uncensored-Q4_K_M.gguf \
  --mmproj mmproj-Ornith-1.5-35B-A3B-uncensored-BF16.gguf \
  --jinja -ngl 99 -c 131072 --port 30003

Quality & limitations

  • Quantization amplifies residual refusals on this model: NVFP4 20/1120, GGUF Q4_K_M 43/1120 on the same eval. For the cleanest behavior use the NVFP4 repo or the Q8_0 file here.
  • MTP speculative decoding is not wired in these GGUFs; the conversion carries the language model plus the multimodal projector (mmproj included).

Provenance & reproducibility

Same master as ressl/Ornith-1.5-35B-A3B-uncensored-NVFP4: residual directions from harmful-vs-harmless rounds, norm-preserving biprojection on 120 residual-writing tensors (including the 256-expert fused down_proj, batched). GGUF via convert_hf_to_gguf.py (BF16 + mmproj) and llama-quantize for the K-quants, validated with llama-server on the full cross-eval plus a German coherence smoke.

License & credits

MIT (inherited from Ornith by the Ornith team, credited to ornith-ai). Abliteration, conversion and validation by Robert Ressl (Hugging Face · Website · LinkedIn · Patreon). Built with llama.cpp, NVIDIA TensorRT Model Optimizer and SGLang.

Support this work: if these models are useful to you, consider supporting on Patreon. A lot of compute and care went into this release; more at ressl.ch.

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