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README.md
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---
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license:
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language:
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- en
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pipeline_tag: token-classification
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tags:
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- gpt-neox
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- tokenizer
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- pythia
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- luna
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- text-generation
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---
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# LUNA Tokenizer
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The **shared tokenizer** for the [LUNA model family](https://huggingface.co/ASTERIZER) — used by both [LUNA-100M](https://huggingface.co/ASTERIZER/LUNA-100M) and [LUNA-300M](https://huggingface.co/ASTERIZER/LUNA-300M).
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It is the **EleutherAI / Pythia-160m (GPT-NeoX) tokenizer**, extracted into a standalone repository so both models — and any future LUNA variants — reference a single canonical source.
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## Details
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| Property | Value |
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|---|---|
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| **Tokenizer class** | `GPTNeoXTokenizer` |
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| **Vocabulary size** | 50,304 (50,254 + EOS padding to multiple of 128) |
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| **BOS token** | `<|endoftext|>` (id 0) |
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| **EOS token** | `<|endoftext|>` (id 0) |
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| **UNK token** | `<|endoftext|>` |
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| **`add_prefix_space`** | false |
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| **Upstream** | EleutherAI/Pythia-160m (gpt-neox-20b lineage) |
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| **License** | Apache-2.0 (upstream EleutherAI tokenizer) |
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## Files
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| File | Description |
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|---|---|
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| `tokenizer.json` | Tokenizer vocabulary + merges (Hugging Face tokenizers format) |
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| `tokenizer_config.json` | Tokenizer configuration (`GPTNeoXTokenizer`, special tokens) |
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| `config.json` | Model-side config (`gpt_neox`, `vocab_size = 50304`) for reference |
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## Usage
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```python
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from transformers import AutoTokenizer
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tok = AutoTokenizer.from_pretrained("ASTERIZER/LUNA-Tokenizer")
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ids = tok.encode("Hello, LUNA!")
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print(tok.decode(ids))
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```
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## Related
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- [LUNA-100M](https://huggingface.co/ASTERIZER/LUNA-100M)
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- [LUNA-300M](https://huggingface.co/ASTERIZER/LUNA-300M)
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- [LUNA-100M Program](https://huggingface.co/collections/ASTERIZER/luna-100m-program-6a9115383c18e52460bf67c9)
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- [LUNA-300M Program](https://huggingface.co/collections/ASTERIZER/luna-300m-program-6a91195ab75671026f83ac94)
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---
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license: cc-by-nc-nd-4.0
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language:
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- en
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pipeline_tag: token-classification
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tags:
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- gpt-neox
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- tokenizer
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- pythia
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- luna
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- text-generation
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---
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# LUNA Tokenizer
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The **shared tokenizer** for the [LUNA model family](https://huggingface.co/ASTERIZER) — used by both [LUNA-100M](https://huggingface.co/ASTERIZER/LUNA-100M) and [LUNA-300M](https://huggingface.co/ASTERIZER/LUNA-300M).
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It is the **EleutherAI / Pythia-160m (GPT-NeoX) tokenizer**, extracted into a standalone repository so both models — and any future LUNA variants — reference a single canonical source.
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## Details
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| Property | Value |
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|---|---|
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| **Tokenizer class** | `GPTNeoXTokenizer` |
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| **Vocabulary size** | 50,304 (50,254 + EOS padding to multiple of 128) |
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| **BOS token** | `<|endoftext|>` (id 0) |
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| **EOS token** | `<|endoftext|>` (id 0) |
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| **UNK token** | `<|endoftext|>` |
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| **`add_prefix_space`** | false |
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| **Upstream** | EleutherAI/Pythia-160m (gpt-neox-20b lineage) |
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| **License** | Apache-2.0 (upstream EleutherAI tokenizer) |
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## Files
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| File | Description |
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|---|---|
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| `tokenizer.json` | Tokenizer vocabulary + merges (Hugging Face tokenizers format) |
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| 38 |
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| `tokenizer_config.json` | Tokenizer configuration (`GPTNeoXTokenizer`, special tokens) |
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| `config.json` | Model-side config (`gpt_neox`, `vocab_size = 50304`) for reference |
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## Usage
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```python
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from transformers import AutoTokenizer
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tok = AutoTokenizer.from_pretrained("ASTERIZER/LUNA-Tokenizer")
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ids = tok.encode("Hello, LUNA!")
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print(tok.decode(ids))
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```
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## Related
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- [LUNA-100M](https://huggingface.co/ASTERIZER/LUNA-100M)
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- [LUNA-300M](https://huggingface.co/ASTERIZER/LUNA-300M)
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- [LUNA-100M Program](https://huggingface.co/collections/ASTERIZER/luna-100m-program-6a9115383c18e52460bf67c9)
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- [LUNA-300M Program](https://huggingface.co/collections/ASTERIZER/luna-300m-program-6a91195ab75671026f83ac94)
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