Nous Research unveils Arete-27B, a post-trained model built to reduce Chinese AI propaganda

Nous Research has released Arete-27B, a fine-tuned language model built on a Qwen base that the company describes as an effort to reinforce Western values on a Chinese-trained foundation. The headline result: a propaganda rate reduced from 22% to 1%, with no significant loss in general performance.

The name is deliberately chosen. Arete, written in Greek as ἀρετή, is the classical concept of excellence and virtue, specifically the full realization of something’s highest potential. For Nous, it doubles as a mission statement.

What Nous actually did

Qwen is Alibaba’s family of open-weight language models, widely used as a base for fine-tuning across the open-source AI community. The models are capable and freely available, which makes them attractive starting points. They also carry measurable ideological tendencies baked in during pre-training on Chinese data, which is where the 22% propaganda rate figure comes from.

Nous applied post-training, the technical term for supervised fine-tuning and reinforcement learning steps that happen after a model’s initial training run, to adjust those tendencies. The company calls this process value alignment, though the specific direction here is explicit: reduce outputs consistent with Chinese state narratives and move them toward Western liberal norms.

Nous Research is best known for its Hermes series of open-weight models, which have built a following in the open-source community for instruction-following quality and reduced refusals compared to more restrictive commercial alternatives.

Nous Research’s position in the open-source AI landscape

Nous Research raised a reported $50 million Series A in April 2025, followed by a reported $90 million funding round. The company has consistently operated in the open-weight space, releasing models that competitors and independent developers can build on directly.