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README.md
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---
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base_model:
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- HuggingFaceTB/SmolLM3-3B-Base
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library_name: transformers
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license: apache-2.0
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language:
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- en
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- fr
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- es
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- it
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- pt
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- zh
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- ar
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- ru
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tags:
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- transformers.js
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- unsloth
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---
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<div>
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<p style="margin-top: 0;margin-bottom: 0;">
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<em><a href="https://docs.unsloth.ai/basics/unsloth-dynamic-v2.0-gguf">Unsloth Dynamic 2.0</a> achieves superior accuracy & outperforms other leading quants.</em>
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</p>
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<div style="display: flex; gap: 5px; align-items: center; ">
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<a href="https://github.com/unslothai/unsloth/">
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<img src="https://github.com/unslothai/unsloth/raw/main/images/unsloth%20new%20logo.png" width="133">
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</a>
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<a href="https://discord.gg/unsloth">
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<img src="https://github.com/unslothai/unsloth/raw/main/images/Discord%20button.png" width="173">
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</a>
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<a href="https://docs.unsloth.ai/">
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<img src="https://raw.githubusercontent.com/unslothai/unsloth/refs/heads/main/images/documentation%20green%20button.png" width="143">
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</a>
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</div>
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</div>
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# SmolLM3
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## Table of Contents
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1. [Model Summary](#model-summary)
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2. [How to use](#how-to-use)
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3. [Evaluation](#evaluation)
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4. [Training](#training)
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5. [Limitations](#limitations)
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6. [License](#license)
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## Model Summary
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SmolLM3 is a 3B parameter language model designed to push the boundaries of small models. It supports 6 languages, advanced reasoning and long context. SmolLM3 is a fully open model that offers strong performance at the 3B–4B scale.
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**SmolLM3-3B-Base** is the base model after pretraining, you can find the instruct model at [SmolLM3-3B](https://huggingface.co/HuggingFaceTB/SmolLM3-3B).
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The model is a decoder-only transformer using GQA and NoPE, it was pretrained on 11.2T tokens with a staged curriculum of web, code, math and reasoning data. Post-training included midtraining on 140B reasoning tokens followed by supervised fine-tuning and alignment via Anchored Preference Optimization (APO).
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### Key features
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- Instruct model optimized for **hybrid reasoning**
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- **Fully open model**: open weights + full training details including public data mixture and training configs
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- **Long context:** Trained on 64k context and suppots up to **128k tokens** using YARN extrapolation
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- **Multilingual**: 6 natively supported (English, French, Spanish, German, Italian, and Portuguese)
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For more details refer to our blog post: https://hf.co/blog/smollm3
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### How to use
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The modeling code for SmolLM3 is available in transformers `v4.53.0`, so make sure to upgrade your transformers version. You can also load the model with the latest `vllm` which uses transformers as a backend.
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```bash
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pip install -U transformers
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```
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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checkpoint = "HuggingFaceTB/SmolLM3-3B"
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device = "cuda" # for GPU usage or "cpu" for CPU usage
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tokenizer = AutoTokenizer.from_pretrained(checkpoint)
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# for multiple GPUs install accelerate and do `model = AutoModelForCausalLM.from_pretrained(checkpoint, device_map="auto")`
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model = AutoModelForCausalLM.from_pretrained(checkpoint).to(device)
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inputs = tokenizer.encode("Gravity is", return_tensors="pt").to(device)
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outputs = model.generate(inputs)
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print(tokenizer.decode(outputs[0]))
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```
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For local inference, you can use `llama.cpp`, `ONNX`, `MLX` and `MLC`. You can find quantized checkpoints in this collection (https://huggingface.co/collections/HuggingFaceTB/smollm3-686d33c1fdffe8e635317e23).
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### Long context processing
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The current `config.json` is set for context length up to 65,536 tokens. To handle longer inputs (128k or 256k), we utilize YaRN you can change the `max_position_embeddings` and rope_scaling` to:
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```
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{
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...,
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"rope_scaling": {
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"factor": 2.0, #2x65536=131 072
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"original_max_position_embeddings": 65536,
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"type": "yarn"
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}
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}
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```
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## Evaluation
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In this section, we report the evaluation results of SmolLM3 model. All evaluations are zero-shot unless stated otherwise, and we use [lighteval](https://github.com/huggingface/lighteval) to run them.
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We highlight the best score in bold and underline the second-best score.
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### Base Pre-Trained Model
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#### English benchmarks
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Note: All evaluations are zero-shot unless stated otherwise. For Ruler 64k evaluation, we apply YaRN to the Qwen models with 32k context to extrapolate the context length.
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| Category | Metric | SmolLM3-3B | Qwen2.5-3B | Llama3-3.2B | Qwen3-1.7B-Base | Qwen3-4B-Base |
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|---------|--------|---------------------|------------|--------------|------------------|---------------|
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| Reasoning & Commonsense| HellaSwag | **76.15** | 74.19 |<u>75.52</u> | 60.52 | 74.37 |
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| | ARC-CF (Average) | **65.61** | 59.81 | 58.58 | 55.88 | <u>62.11</u> |
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| | Winogrande | 58.88 | **61.41** | 58.72 | 57.06 | <u>59.59</u> |
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| | CommonsenseQA | <u>55.28</u> | 49.14 | **60.60** | 48.98 | 52.99 |
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| Knowledge & Understanding | MMLU-CF (Average) | <u>44.13</u> | 42.93 | 41.32 | 39.11 | **47.65** |
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| | MMLU Pro CF | <u>19.61</u> | 16.66 | 16.42 | 18.04 | **24.92** |
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| | MMLU Pro MCF | <u>32.70</u> | 31.32 | 25.07 | 30.39 | **41.07** |
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| | PIQA | **78.89** | 78.35 | <u>78.51</u> | 75.35 | 77.58 |
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| | OpenBookQA | 40.60 | 40.20 | <u>42.00</u> | 36.40 | **42.40** |
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| | BoolQ | **78.99** | 73.61 | <u>75.33</u> | 74.46 | 74.28 |
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| **Math & Code** | | | | | | |
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| Coding & math | HumanEval+ | 30.48 | 34.14| 25.00 | <u>43.29</u>| **54.87** |
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| | MBPP+ | 52.91 | 52.11 | 38.88| <u>59.25</u> | **63.75** |
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| | MATH (4-shot) | <u>46.10</u> | 40.10 | 7.44 | 41.64 | **51.20** |
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| | GSM8k (5-shot) | 67.63 | <u>70.13</u> | 25.92 | 65.88 | **74.14** |
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| **Long context** | | | | | | |
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| | Ruler 32k | 76.35 | 75.93 | <u>77.58</u> | 70.63 | **83.98** |
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| | Ruler 64k | <u>67.85</u> | 64.90 | **72.93** | 57.18 | 60.29 |
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| | Ruler 128k | 61.03 | <u>62.23</u> | **71.30** | 43.03 | 47.23 |
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#### Multilingual benchmarks
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| Category | Metric | SmolLM3 3B Base | Qwen2.5-3B | Llama3.2 3B | Qwen3 1.7B Base | Qwen3 4B Base |
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|---------|--------|---------------------|------------|--------------|------------------|---------------|
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| Main supported languages | | | | | | | |
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| French| MLMM Hellaswag | **63.94** | 57.47 | 57.66 | 51.26 | <u>61.00</u> |
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| | Belebele | 51.00 | <u>51.55</u> | 49.22 |49.44| **55.00** |
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| | Global MMLU (CF) | <u>38.37</u> | 34.22 | 33.71 | 34.94 |**41.80** |
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| | Flores-200 (5-shot) | 62.85| 61.38| <u>62.89<u/u> | 58.68 | **65.76** |
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| Spanish| MLMM Hellaswag | **65.85** | 58.25 | 59.39 | 52.40 | <u>61.85</u> |
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| | Belebele | 47.00 | <u>48.88</u> | 47.00 | 47.56 | **50.33** |
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| | Global MMLU (CF) | <u>38.51</u> | 35.84 | 35.60 | 34.79 |**41.22** |
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| | Flores-200 (5-shot) | <u>48.25</u>| 50.00| 44.45 | 46.93 | **50.16** |
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| German| MLMM Hellaswag | **59.56** | 49.99| 53.19|46.10| <u>56.43</u>|
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| | Belebele | <u>48.44</u> | 47.88 | 46.22 | 48.00 | **53.44**|
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| | Global MMLU (CF) | <u>35.10</u> | 33.19 | 32.60 | 32.73 |**38.70** |
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| | Flores-200 (5-shot) | **56.60**| 50.63| <u>54.95</u> | 52.58 | 50.48 |
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| Italian| MLMM Hellaswag | **62.49** | 53.21 | 54.96 | 48.72 | <u>58.76</u> |
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| | Belebele | <u>46.44</u> | 44.77 | 43.88 | 44.00 | **48.78** | 44.88 |
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| | Global MMLU (CF) | <u>36.99</u> | 33.91 | 32.79 | 35.37 |**39.26** |
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| | Flores-200 (5-shot) | <u>52.65<u/>| **54.87**| 48.83 | 48.37 | 49.11 |
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| Portuguese| MLMM Hellaswag | **63.22** | 57.38 | 56.84 | 50.73 | <u>59.89</u> |
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| | Belebele | 47.67 | **49.22** | 45.00 | 44.00 | 50.00 | <u>49.00</U> |
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| | Global MMLU (CF) | <u>36.88</u> | 34.72 | 33.05 | 35.26 |**40.66** |
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| | Flores-200 (5-shot) | <u>60.93</u> |57.68| 54.28 | 56.58 | **63.43** |
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The model has also been trained on Arabic (standard), Chinese and Russian data, but has seen fewer tokens in these languages compared to the 6 above. We report the performance on these langages for information.
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| Category | Metric | SmolLM3 3B Base | Qwen2.5-3B | Llama3.2 3B | Qwen3 1.7B Base | Qwen3 4B Base |
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|---------|--------|---------------------|------------|--------------|------------------|---------------|
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| Other supported languages | | | | | | | |
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| Arabic| Belebele | 40.22 | 44.22 | <u>45.33</u> | 42.33 | **51.78** |
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| | Global MMLU (CF) | 28.57 | 28.81 | 27.67 | <u>29.37</u> | **31.85** |
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| | Flores-200 (5-shot) | <u>40.22</u> | 39.44 | **44.43** | 35.82 | 39.76 |
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| Chinese| Belebele | 43.78 | 44.56 | <u>49.56</u> | 48.78 | **53.22** |
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| | Global MMLU (CF) | 36.16 | 33.79 | <u>39.57</u> | 38.56 | **44.55** |
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| | Flores-200 (5-shot) | 29.17 | **33.21** | 31.89 | 25.70 | <u>32.50</u> |
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| Russian| Belebele | <u>47.44</u> | 45.89 | <u>47.44</u> | 45.22 | **51.44** |
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| | Global MMLU (CF) | <u>36.51</u> | 32.47 | 34.52 | 34.83 | **38.80** |
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| | Flores-200 (5-shot) | 47.13 | 48.74 | 50.74 | <u>54.70</u> | **60.53** |
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### Instruction Model
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#### No Extended Thinking
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Evaluation results of non reasoning models and reasoning models in no thinking mode. We highlight the best and second-best scores in bold.
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| Category | Metric | SmoLLM3-3B | Qwen2.5-3B | Llama3.1-3B | Qwen3-1.7B | Qwen3-4B |
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|---------|--------|------------|------------|-------------|------------|----------|
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| High school math competition | AIME 2025 | <u>9.3</u> | 2.9 | 0.3 | 8.0 | **17.1** |
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| Math problem-solving | GSM-Plus | 72.8 | <u>74.1</u> | 59.2 | 68.3 | **82.1** |
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| Competitive programming | LiveCodeBench v4 | <u>15.2</u> | 10.5 | 3.4 | 15.0 | **24.9** |
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| Graduate-level reasoning | GPQA Diamond | <u>35.7</u> | 32.2 | 29.4 | 31.8 | **44.4** |
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| Instruction following | IFEval | **76.7** | 65.6 | 71.6 | <u>74.0</u> | 68.9 |
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| Alignment | MixEval Hard | 26.9 | <u>27.6</u> | 24.9 | 24.3 | **31.6** |
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| Tool Calling | BFCL| <u>92.3</u> | - | <u>92.3</u> * | 89.5 | **95.0** |
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| Multilingual Q&A | Global MMLU | <u>53.5</u> | 50.54 | 46.8 | 49.5 | **65.1** |
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(*): this is a tool calling finetune
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#### Extended Thinking
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Evaluation results in reasoning mode for SmolLM3 and Qwen3 models:
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| Category | Metric | SmoLLM3-3B | Qwen3-1.7B | Qwen3-4B |
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|---------|--------|------------|------------|----------|
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| High school math competition | AIME 2025 | <u>36.7</u> | 30.7 | **58.8** |
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| Math problem-solving | GSM-Plus | <u>83.4</u> | 79.4 | **88.2** |
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| Competitive programming | LiveCodeBench v4 | 30.0 | <u>34.4</u> | **52.9** |
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| Graduate-level reasoning | GPQA Diamond | <u>41.7</u> | 39.9 | **55.3** |
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| Instruction following | IFEval | 71.2 | <u>74.2</u> | **85.4** |
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| Alignment | MixEval Hard | 30.8 | <u>33.9</u> | **38.0** |
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| Tool Calling | BFCL | <u>88.8</u> | <u>88.8</u> | **95.5** |
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| Multilingual Q&A | Global MMLU | <u>64.1</u> | 62.3 | **73.3** |
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## Training
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### Model
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- **Architecture:** Transformer decoder
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- **Pretraining tokens:** 11T
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- **Precision:** bfloat16
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### Software & hardware
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- **GPUs:** 384 H100
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- **Training Framework:** [nanotron](https://github.com/huggingface/nanotron/tree/main)
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- **Data processing framework:** [datatrove](https://github.com/huggingface/datatrove)
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- **Evaluation framework:** [lighteval](https://github.com/huggingface/lighteval)
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- **Post-training Framework:** [TRL](https://github.com/huggingface/trl)
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### Open resources
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Here is an infographic with all the training details.
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- The datasets used for pretraining can be found in this [collection](https://huggingface.co/collections/HuggingFaceTB/smollm3-pretraining-datasets-685a7353fdc01aecde51b1d9) and those used in mid-training and post-training will be released in the following weeks
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- The training and evaluation configs and code can be found in the [huggingface/smollm](https://github.com/huggingface/smollm) repository.
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## Limitations
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SmolLM3 can produce text on a variety of topics, but the generated content may not always be factually accurate, logically consistent, or free from biases present in the training data. These models should be used as assistive tools rather than definitive sources of information. Users should always verify important information and critically evaluate any generated content.
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## License
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[Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0)
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config.json
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config.json
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size 2025
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configuration.json
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configuration.json
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{"framework": "pytorch", "task": "text-generation", "allow_remote": true}
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generation_config.json
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generation_config.json
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{
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"_from_model_config": true,
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"bos_token_id": 128000,
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"eos_token_id": 128001,
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"max_length": 65536,
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"pad_token_id": 128004,
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"transformers_version": "4.53.2"
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}
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model-00001-of-00002.safetensors
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model-00001-of-00002.safetensors
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||||
3
model.safetensors.index.json
Normal file
3
model.safetensors.index.json
Normal file
@@ -0,0 +1,3 @@
|
||||
version https://git-lfs.github.com/spec/v1
|
||||
oid sha256:e3a7254c086c4a78f95ad5864f435d165ffed1ed8998326ce5107b4423c15b76
|
||||
size 26899
|
||||
16
special_tokens_map.json
Normal file
16
special_tokens_map.json
Normal file
@@ -0,0 +1,16 @@
|
||||
{
|
||||
"eos_token": {
|
||||
"content": "<|end_of_text|>",
|
||||
"lstrip": false,
|
||||
"normalized": false,
|
||||
"rstrip": false,
|
||||
"single_word": false
|
||||
},
|
||||
"pad_token": {
|
||||
"content": "<|finetune_right_pad_id|>",
|
||||
"lstrip": false,
|
||||
"normalized": false,
|
||||
"rstrip": false,
|
||||
"single_word": false
|
||||
}
|
||||
}
|
||||
3
tokenizer.json
Normal file
3
tokenizer.json
Normal file
@@ -0,0 +1,3 @@
|
||||
version https://git-lfs.github.com/spec/v1
|
||||
oid sha256:ab4da6b2aa68247e9c0fa9b97fc7fcc796505038d01f7e144522a65ce0dbd2e5
|
||||
size 17208861
|
||||
3
tokenizer_config.json
Normal file
3
tokenizer_config.json
Normal file
@@ -0,0 +1,3 @@
|
||||
version https://git-lfs.github.com/spec/v1
|
||||
oid sha256:8c4721bb58dff219fe6a7f16fb4f1b1ca79a04792b2794f144b8067894276315
|
||||
size 50494
|
||||
Reference in New Issue
Block a user