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--- |
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library_name: transformers |
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license: apache-2.0 |
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datasets: |
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- kurakurai/luth-sft |
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language: |
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- fr |
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- en |
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base_model: |
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- Qwen/Qwen3-1.7B |
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pipeline_tag: text-generation |
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--- |
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# Luth-1.7B-Instruct |
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**Luth-1.7B-Instruct** is a French fine-tuned version of [Qwen3-1.7B](https://huggingface.co/Qwen/Qwen3-1.7B), trained on the [Luth-SFT](https://huggingface.co/datasets/kurakurai/luth-sft) dataset. The model has drastically improved its French capabilities in instruction following, math, and general knowledge. Additionally, its English capabilities have remained stable and have even increased in some areas. |
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Our Evaluation, training and data scripts are available on [GitHub](https://github.com/kurakurai/Luth), along with the [Blog](https://huggingface.co/blog/MaxLSB/luth) we wrote. |
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## Model Details |
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Luth was trained using full fine-tuning on the Luth-SFT dataset with [Axolotl](https://github.com/axolotl-ai-cloud/axolotl). The resulting model was then merged with the base Qwen3-1.7B model. This process successfully retained the model's English capabilities while improving its performance on most selected benchmarks in both French and English. |
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## Benchmark Results |
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We used LightEval for evaluation, with custom tasks for the French benchmarks. The models were evaluated with a `temperature=0`. |
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### French Benchmark Scores |
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| Model | IFEval<br>French | GPQA-Diamond<br>French | MMLU<br>French | Math500<br>French | Arc-Challenge<br>French | Hellaswag<br>French | |
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|------------------------|-----------------|-----------------------|----------------|-----------------|------------------------|-------------------| |
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| **Luth-1.7B-Instruct** | <u>58.53</u> | <u>36.55</u> | <u>49.75</u> | <u>62.60</u> | 35.16 | 31.88 | |
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| Qwen3-1.7B | 54.71 | 31.98 | 28.49 | 60.40 | 33.28 | 24.86 | |
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| SmolLM2-1.7B-Instruct | 30.93 | 20.30 | 33.73 | 10.20 | 28.57 | <u>49.58</u> | |
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| Qwen2.5-1.5B-Instruct | 31.30 | 27.41 | 46.25 | 33.20 | 32.68 | 34.33 | |
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| LFM2-1.2B | 54.41 | 22.84 | 47.59 | 36.80 | <u>39.44</u> | 33.05 | |
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### English Benchmark Scores |
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| Model | IFEval<br>English | GPQA-Diamond<br>English | MMLU<br>English | Math500<br>English | Arc-Challenge<br>English | Hellaswag<br>English | |
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|------------------------|-----------------|------------------------|----------------|------------------|-------------------------|--------------------| |
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| **Luth-1.7B-Instruct** | 65.80 | 29.80 | <u>60.28</u> | 70.40 | 42.24 | 58.53 | |
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| Qwen3-1.7B | <u>68.88</u> | <u>31.82</u> | 52.82 | <u>71.20</u> | 36.18 | 46.98 | |
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| SmolLM2-1.7B-Instruct | 49.04 | 25.08 | 50.27 | 22.67 | 42.32 | <u>66.94</u> | |
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| Qwen2.5-1.5B-Instruct | 39.99 | 25.76 | 59.81 | 57.20 | 41.04 | 64.48 | |
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| LFM2-1.2B | 68.52 | 24.24 | 55.22 | 45.80 | <u>42.58</u> | 57.61 | |
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## Code Example |
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```python |
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from transformers import AutoTokenizer, AutoModelForCausalLM |
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tokenizer = AutoTokenizer.from_pretrained("kurakurai/Luth-1.7B-Instruct") |
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model = AutoModelForCausalLM.from_pretrained("kurakurai/Luth-1.7B-Instruct") |
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messages = [ |
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{"role": "user", "content": "Quelle est la capitale de la France?"}, |
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] |
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inputs = tokenizer.apply_chat_template( |
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messages, |
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add_generation_prompt=True, |
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tokenize=True, |
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return_dict=True, |
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return_tensors="pt", |
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).to(model.device) |
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outputs = model.generate(**inputs, max_new_tokens=100) |
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print( |
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tokenizer.decode( |
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outputs[0][inputs["input_ids"].shape[-1] :], skip_special_tokens=True |
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) |
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) |
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``` |
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## Citation |
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```bibtex |
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@misc{luth2025kurakurai, |
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title = {Luth: Efficient French Specialization for Small Language Models and Cross-Lingual Transfer}, |
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author = {Lasbordes, Maxence and Gad, Sinoué}, |
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year = {2025}, |
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howpublished = {\url{https://arxiv.org/abs/2510.05846}}, |
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note = {arXiv:2510.05846} |
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} |
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``` |
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