GPT-oss-20b-abliterated-uncensored
20BGPT-OSSuncensored
from huihui-ai/Huihui-gpt-oss-20b-BF16-abliterated
↓ 44K♥ 5459 repos
gpt-oss-20b-Derestricted
gpt-oss-20b-Derestricted is a abliterated and uncensored variant of ArliAI/gpt-oss-20b-Derestricted, published on Hugging Face by ArliAI. It is 20B parameters, 24GB VRAM class class and apache-2.0 licence. It is distributed across 11 repositories in Transformers, GGUF, GGUF (imatrix) and MLX formats, totalling 9.8K downloads.
Specification
- Model name
- gpt-oss-20b-Derestricted
- Source repository
- ArliAI/gpt-oss-20b-Derestricted
- Base model
- ArliAI/gpt-oss-20b-Derestricted
- Publisher
- ArliAI
- Parameters
- 20B
- Hardware class
- 10B – 25B — 24GB VRAM class
- Licence
- apache-2.0
- Task
- Text generation
- Context window
- Not documented
- Ablation scope
- Not stated by the publisher
- Formats available
- Transformers, GGUF, GGUF (imatrix), MLX
- First indexed
- 27 Nov 2025
- Last updated
- 8 Apr 2026
Ablation technique
How gpt-oss-20b-Derestricted was modified, and what that implies.
Abliteration + uncensored fine-tune
Directional ablation combined with additional fine-tuning on unfiltered data, so behaviour diverges from the base model beyond refusal removal alone.
Reported scope: Not stated by the publisher. Publishers frequently omit this, so verify behaviour empirically rather than assuming full coverage.
From the publisher’s model card
“After the initial success of GLM-4.5-Air-Derestricted, we thought it would be interesting to try and Derestrict one of the most famously restrictive model which is gpt-oss-20b.”
Running it
Commands are templates — confirm the exact repository and quant file before use.
Ollama (publisher-documented)
ollama run gpt-oss:20bllama.cpp / GGUF
hf download mradermacher/gpt-oss-20b-Derestricted-i1-GGUF --local-dir ./gpt-oss-20b-derestricted
llama-cli -m ./gpt-oss-20b-derestricted/<file>.gguf -p "..."Transformers
from transformers import AutoModelForCausalLM, AutoTokenizer
repo = "ArliAI/gpt-oss-20b-Derestricted"
tok = AutoTokenizer.from_pretrained(repo)
model = AutoModelForCausalLM.from_pretrained(
repo, torch_dtype="auto", device_map="auto"
)vLLM
vllm serve ArliAI/gpt-oss-20b-Derestricted --trust-remote-codeDownloads and variants (10)
Every published repository of gpt-oss-20b-Derestricted, including quantised re-releases by other authors.
| Repository | Format | Downloads |
|---|---|---|
| mradermacher/gpt-oss-20b-Derestricted-i1-GGUF | GGUF (imatrix) | 3.6K |
| Mungert/gpt-oss-20b-Derestricted-GGUF | GGUF | 3.5K |
| ArliAI/gpt-oss-20b-Derestrictedsource | Transformers | 953 |
| mradermacher/gpt-oss-20b-Derestricted-GGUF | GGUF | 918 |
| gghfez/gpt-oss-20b-Derestricted-Q4_K_M-GGUF | GGUF | 348 |
| txgsync/gpt-oss-20b-Derestricted-mxfp4-mlx | MLX | 305 |
| jorge-erdb/gpt-oss-20b-Derestricted-4bit-GGUF | GGUF | 143 |
| Gabrieliam/gpt-oss-20b-Derestricted-Q8_0-GGUF | GGUF | 19 |
| Lobitta/gpt-oss-20b-Derestricted-Q8_0-GGUF | GGUF | 19 |
| psychopenguin/gpt-oss-20b-Derestricted-Q4_K_M-GGUF | GGUF | 16 |
Security-team assessment
Derived from this model’s metadata and the publisher’s claims — not from benchmarks run by this site.
- gpt-oss-20b-Derestricted will attempt offensive-security prompts that a hosted commercial model declines, which is what makes it usable for red-team corpus generation and for measuring what an unaligned model of this class produces.
- Capability is inherited from ArliAI/gpt-oss-20b-Derestricted, not added by ablation — at 20B parameters, expect roughly the base model’s competence, minus some instruction-following fidelity.
- The publisher does not state which layers were ablated, so assume nothing about refusal consistency — probe it directly.
- This release adds fine-tuning on unfiltered data, so its behaviour diverges from the base model beyond refusal removal — differences you measure cannot be attributed to ablation alone.
- Declared licence is apache-2.0, but the terms that bind you are ArliAI/gpt-oss-20b-Derestricted’s — a re-release cannot grant more than its parent.
Handling: run it isolated, put moderation in front of it if anyone outside your team can reach it, and verify the weights before loading — these are third-party artifacts. Full handling and licence guidance.
Metadata for gpt-oss-20b-Derestricted is collected from the public Hugging Face API and the publisher’s model card. This site does not host weights, is not affiliated with ArliAI, and does not independently verify publisher claims. See responsible use.