pico-decoder-small-1 trained to 125k steps

README.md

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+---
+datasets:
+- pico-lm/pretokenized-dolma
+language:
+- en
+license: apache-2.0
+metrics:
+- pico-lm/perplexity
+pipeline_tag: text-generation
+---
+
+# Pico Decoder Small
+
+**pico-decoder-small** is a 65M parameter model in the `pico-decoder` suite — a lightweight, LLaMA-style decoder-only transformer trained from scratch using [`pico-train`](https://github.com/pico-lm/pico-train). It is designed for transparent and reproducible research into the learning dynamics of language models, and is fully compatible with the `pico-analyze` toolkit for detailed interpretability analysis.
+
+> NOTE: The `pico-decoder-small-1` branch contains the full commit history for the training run. 
+
+## 🔧 Model Details
+
+| Field               | Value                              |
+|---------------------|------------------------------------|
+| **Architecture**     | Decoder-only transformer (LLaMA-style) |
+| **Parameters**       | 65M                               |
+| **Layers**           | 12                                |
+| **Hidden Size**      | 384                               |
+| **Feed Foward Size** | 1536                              |
+| **Attention Heads**  | 12                                |
+| **Key/Value Heads**  | 4                                 |
+
+## 📚 Training
+
+- **Dataset**: [`pretokenized-dolma`](https://huggingface.co/datasets/pico-lm/pretokenized-dolma), English-only
+- **Training steps**: 200,000
+- **Batch size**: 1024
+- **Sequence length**: 2048
+- **Optimizer**: AdamW
+- **Learning rate schedule**: Linear decay with warmup
+- **Compute**: 16 A100-SXM4-80GB GPUs
+
+## 📈 Evaluation and Analysis
+
+This model supports fine-grained analysis using [`pico-analyze`](https://github.com/pico-lm/pico-analyze). This tool enables researchers to understand how learning unfolds over training, even at modest scales.
+
+We also evaluate perplexity of the model on the [`pico-paloma-tinsy`](https://huggingface.co/datasets/pico-lm/pretokenized-paloma-tinsy) dataset.
+
+## 📄 Citation
+
+If you use `pico-small` or any other `pico-decoder` model in your research, please cite:
+
+```bibtex
+@software{pico2025,
+    author = {Diehl Martinez, Richard},
+    title = {Pico: A Lightweight Framework for Studying Language Model Learning Dynamics},
+    year = {2025},
+    url = {https://github.com/pico-lm}
+}

config.json

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+{
+  "activation_hidden_dim": 1536,
+  "architectures": [
+    "PicoDecoderHF"
+  ],
+  "attention_n_heads": 12,
+  "attention_n_kv_heads": 4,
+  "auto_map": {
+    "AutoConfig": "pico_decoder.PicoDecoderHFConfig",
+    "AutoModelForCausalLM": "pico_decoder.PicoDecoderHF"
+  },
+  "batch_size": 1024,
+  "d_model": 384,
+  "max_seq_len": 2048,
+  "model_type": "pico_decoder",
+  "n_layers": 12,
+  "norm_eps": 1e-06,
+  "position_emb_theta": 10000.0,
+  "torch_dtype": "float32",
+  "transformers_version": "4.48.3",
+  "vocab_size": 50304
+}

eval_results/step_0.json

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+{"paloma": 59235.520549324916}

eval_results/step_1000.json

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+{"paloma": 792.1833685393118}

eval_results/step_10000.json

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+{"paloma": 65.94262431332459}

eval_results/step_100000.json

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+{"paloma": 43.36404886320493}

eval_results/step_101000.json

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+{"paloma": 43.263255441479565}

eval_results/step_102000.json

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+{"paloma": 43.253649176537785}

eval_results/step_103000.json

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+{"paloma": 43.22560267041369}

eval_results/step_104000.json

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+{"paloma": 43.13925088066673}

eval_results/step_105000.json

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+{"paloma": 43.181178607674845}

eval_results/step_106000.json

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+{"paloma": 43.06913597359475}

eval_results/step_107000.json

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+{"paloma": 42.975087318437026}

eval_results/step_108000.json

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+{"paloma": 42.94199747208519}

eval_results/step_109000.json

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+{"paloma": 42.868824278186835}

eval_results/step_11000.json

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+{"paloma": 64.34633452908918}

eval_results/step_110000.json

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+{"paloma": 42.827151819471695}

eval_results/step_111000.json

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+{"paloma": 42.727992517939846}

eval_results/step_112000.json

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+{"paloma": 42.74776250020137}

eval_results/step_113000.json

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+{"paloma": 42.69900836387993}

eval_results/step_114000.json

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+{"paloma": 42.633967242423665}

eval_results/step_115000.json

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+{"paloma": 42.61576641868631}

eval_results/step_116000.json

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+{"paloma": 42.569933022854634}

eval_results/step_117000.json

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+{"paloma": 42.53510425497846}

eval_results/step_118000.json

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+{"paloma": 42.54298578654432}

eval_results/step_119000.json

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+{"paloma": 42.397330363120766}

eval_results/step_12000.json

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+{"paloma": 62.59192442304166}

eval_results/step_120000.json

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+{"paloma": 42.37647307832897}

eval_results/step_121000.json

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+{"paloma": 42.39845054972047}

eval_results/step_122000.json

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+{"paloma": 42.372684175710646}

eval_results/step_123000.json

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+{"paloma": 42.29145676591255}

eval_results/step_124000.json

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+{"paloma": 42.25910740986934}

eval_results/step_125000.json

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+{"paloma": 42.243373122198655}

eval_results/step_13000.json

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+{"paloma": 61.176598006341514}

eval_results/step_14000.json

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+{"paloma": 60.127189135634524}

eval_results/step_15000.json

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+{"paloma": 59.05735223143773}

eval_results/step_16000.json

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+{"paloma": 58.34294593874171}

eval_results/step_17000.json

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+{"paloma": 57.50681012357984}

eval_results/step_18000.json

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+{"paloma": 56.75063220922955}

eval_results/step_19000.json

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+{"paloma": 56.22409683063055}

eval_results/step_2000.json

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+{"paloma": 430.54463134327}

eval_results/step_20000.json

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+{"paloma": 55.70834681912997}

eval_results/step_21000.json

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+{"paloma": 55.09185880999947}

eval_results/step_22000.json

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+{"paloma": 54.68077409824012}

eval_results/step_23000.json

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+{"paloma": 54.099016925931394}

eval_results/step_24000.json

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+{"paloma": 53.69616283332014}

eval_results/step_25000.json

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+{"paloma": 53.325224398403634}

eval_results/step_26000.json

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+{"paloma": 52.88207766685752}

eval_results/step_27000.json

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+{"paloma": 52.41606502532959}

eval_results/step_28000.json

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+{"paloma": 52.10107550388429}