A Jev-style model fine-tuned on Qwen3.5 4B

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Summary

The author fine-tuned Qwen3.5 4B using LoRA with public and synthetic data to create a Jev-style model, achieving improved performance and open-sourcing the model and dataset.

This weekend, I did a fun experiment to create something similar to Jev. I LoRA fine-tuned Qwen3.5 4B using a mix of publicly available datasets and synthetic data. For the synthetic data, I used DeepSeek V4.1 Flash, around 25M tokens. I trained the model for about 2 hours on a rented RTX 3090. So far, the model performs pretty well. It's obviously nowhere near Jev yet, but compared to the base model, it works surprisingly well (0.596 -> 0.709 on typed-decisions). I've open-sourced everything, including the synthetic dataset and a Jev-compatible API endpoint, so you can try it here: https://github.com/n4ze3m/hmm/ https://huggingface.co/n4ze3m/Qwen3.5-4B-Hmm https://huggingface.co/datasets/n4ze3m/typed-decisions-synth
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Bro wtf, Qwen Lab cooked with Qwen 3.8 27B, it's so fucking good

Reddit r/LocalLLaMA

Qwen Lab has released Qwen 3.8 27B, which shows significant improvement over previous versions like Qwen 3.6 27B and other open-source models. The author hopes that Qwen publishes papers to help other labs develop similar high-quality small models.