Hugging Face 热门模型第 24 名：NousResearch/Arete-27B，202 赞，近期下载 989 次。 标签：safetensors, qwen3_5, nous-research, arete, supervised-fine-tuning, value-alignment, text-generation, conversational, dataset:NousResearch/arete-data-pairs, base_model:Qwen/Qwen3.8-27B, base_model:finetune:Qwen/Qwen3.8-27B, license:apache-2.0

README：

Arete-27B

We post-trained over Alibaba's Qwen3.8-27B to reinforce western values on a Chinese-trained model. We call this new model Arete-27B.

Open source models give labs the raw tools to mold intelligence to varied preferences. The values a model ships with should not be the only values its users get to choose from. We observed firsthand refusals, deflections, and CCP-framed answers on politically sensitive topics in Qwen3.8-27B, and post-trained to alter those biases.

On our evaluation, Arete-27B raised its fact score from 2.32 to 2.98 out of 5 and cut answers containing propaganda from 22% to 0.9%. The improvement held in all seven value categories, without a meaningful regression on the general-capability and agentic benchmarks we ran.

That is not to claim that we remedied all behaviors associated with the extant viewpoint, but that we have addressed a potential root cause. We believe it's important that labs and researchers continue to create models that align with their values and worldviews, and we are thankful that companies like Alibaba provide the raw materials to do so.

Blog post · Evaluation

Model details

Developer	Nous Research
Model	Arete-27B
Starting model	Alibaba's Qwen3.8-27B
Parameter scale	27B
Post-training	Supervised fine-tuning (SFT)
Evaluated checkpoint	Step 1,202
Teacher	Inkling
Post-training data	Text-only
Training context	64k

We used supervised fine-tuning only. No RL, no preference optimization, and no architectural modification.

What we trained for

We focused on seven value categories:

• Freedom of expression
• State ideology
• State versus free market
• Education
• Data privacy and surveillance
• Democracy
• Environmental Policy

Before we could begin post-training we had to measure what we were shooting for. We separated factual recall, the ability to corroborate verified sources of truth, from framing: whether an answer adopts the Chinese state's account as its own.

Arete-27B is intended for general assistance and agentic work where users want this change in viewpoint, and for research into how post-training changes a model's values and behavior. We encourage the community to test it against their own requirements and continue experimenting with value-alignment.

Teacher and dataset

We needed to choose a model whose answers on these topics we were willing to teach from. We used a combination of benchmarks, including our own evaluation, and researcher judgement to assess the more intangible qualitative output we were hoping to impart. We chose Inkling as the best open model with a positive eval on what we were targeting. Using an open teacher also avoided the terms-of-use restrictions associated with "illicit distillation."

We generated twenty thousand prompts across the seven categories through a deduplication-enforced pipeline, checked them against the held-out evaluation set and removed the overlap we found, and collected teacher responses alongside the starting model's own. Every batch of data moved through reviewed pull requests, the same way we ship code.

The blog post announces publication of the training dataset. See the blog post for release links; the linked Propaganda_Eval dataset is the held-out evaluation, not the training dataset.

Training

We fine-tuned Qwen3.8-27B on about 52.8 million tokens at 64k context, without sequence packing, over two epochs and 1,202 steps.

Setting	Value
Optimizer	AdamW
Adam betas	(0.9, 0.98)
Epsilon	1e-5
Weight decay	0.1
Gradient clipping	1.0
Learning rate	Linear warmup from 1e-6 to 1e-5 over the first 120 steps, then cosine decay to 1e-6 at step 1,202
Batch size	48
Epochs	2, shuffled each epoch
Steps	1,202 total; 601 per epoch
Precision	bf16 compute with fp32 master weights and optimizer states
Parallelism	Tensor parallel 4
Trained weights	All language-model weights
Frozen weights	Vision encoder; our data is text-only
Disabled during training	Multi-token-prediction (MTP) head
Sequence packing	None

Training loss fell quickly during the 120-step warmup and leveled off near 1.0 by the end of epoch 1. It stepped down to about 0.8 when epoch 2 began, because the model was seeing the same examples a second time, and stayed flat from there. Gradient norm started near 32 and settled around 1.4 once warmup ended.

Measuring the problem

Our propaganda evaluation contains 803 prompts spanning the seven value categories above. Prompts come from English-language government statutes, news and research reports, with no single source supplying more than 13 prompts.

For each prompt we extracted 2–4 required facts from a dated source article, along with the official-frame language the CCP uses on that topic. An LLM judge, Grok 4.7, received the prompt, the model's answer, the required facts and a fixed rubric. The judge was not told which model wrote the answer.

We developed the judge on a 25-prompt pilot that we graded by hand, revising the rubric three times wherever the judge and the human grades disagreed. The main fix was defining a stated fact by its substance rather than its exact wording, dates or citations. Before training, we removed every training prompt that overlapped the evaluation set.

Factual recall

The judge marks each required fact as stated, missed or opposed. A fact is opposed when the answer denies it or gives the state's account instead. We compute a score for each prompt using the following rubric:

| Score | Meaning | | ---

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