---
language: th
license: apache-2.0
tags:
- thai
- tokenizer
- nlp
- subword
model_type: unigram
library_name: tokenizers
pretty_name: Advanced Thai Tokenizer V3
datasets:
- ZombitX64/Thai-corpus-word
metrics:
- accuracy
- character
---

# Advanced Thai Tokenizer V3

## Overview
Advanced Thai language tokenizer (Unigram, HuggingFace-compatible) trained on a large, cleaned, real-world Thai corpus. Handles Thai, mixed Thai-English, numbers, and modern vocabulary. Designed for LLM/NLP use, with robust roundtrip accuracy and no byte-level artifacts.

## Performance
- **Overall Accuracy:** 24/24 (100.0%)
- **Vocabulary Size:** 35,590 tokens
- **Average Compression:** 3.45 chars/token
- **UNK Ratio:** 0%
- **Thai Character Coverage:** 100%
- **Tested on:** Real-world, mixed, and edge-case sentences
- **Training Corpus:** `combined_thai_corpus.txt` (cleaned, deduplicated, multi-domain)

## Key Features
- ✅ No Thai character corruption (no byte-level fallback, no normalization loss)
- ✅ Handles mixed Thai-English, numbers, and symbols
- ✅ Modern vocabulary (internet, technology, social, business)
- ✅ Efficient compression (subword, not word-level)
- ✅ Clean decoding without artifacts
- ✅ HuggingFace-compatible (tokenizer.json, vocab.json, config)
- ✅ Production-ready: tested, documented, and robust

## Quick Start
```python
from transformers import AutoTokenizer

# Load tokenizer from HuggingFace Hub
try:
    tokenizer = AutoTokenizer.from_pretrained("ZombitX64/Thaitokenizer")
    text = "นั่งตาก ลม"
    tokens = tokenizer.tokenize(text)
    print(f"Tokens: {tokens}")
    encoding = tokenizer(text, return_tensors=None, add_special_tokens=False)
    decoded = tokenizer.decode(encoding['input_ids'], skip_special_tokens=True)
    print(f"Original: {text}")
    print(f"Decoded: {decoded}")
except Exception as e:
    print(f"Error loading tokenizer: {e}")
```

## Files
- `tokenizer.json` — Main tokenizer file (HuggingFace format)
- `vocab.json` — Vocabulary mapping
- `tokenizer_config.json` — Transformers config
- `metadata.json` — Performance and configuration details
- `usage_examples.json` — Code examples
- `README.md` — This file
- `combined_thai_corpus.txt` — Training corpus (not included in repo, see dataset card)

Created: July 2025

---

# Model Card for Advanced Thai Tokenizer V3

## Model Details

**Developed by:** ZombitX64 (https://huggingface.co/ZombitX64)  
**Model type:** Unigram (subword) tokenizer  
**Language(s):** th (Thai), mixed Thai-English  
**License:** Apache-2.0  
**Finetuned from model:** N/A (trained from scratch)

### Model Sources
- **Repository:** https://huggingface.co/ZombitX64/Thaitokenizer

## Uses

### Direct Use
- Tokenization for Thai LLMs, NLP, and downstream tasks
- Preprocessing for text classification, NER, QA, summarization, etc.
- Robust for mixed Thai-English, numbers, and social content

### Downstream Use
- Plug into HuggingFace Transformers pipelines
- Use as tokenizer for Thai LLM pretraining/fine-tuning
- Integrate with spaCy, PyThaiNLP, or custom pipelines

### Out-of-Scope Use
- Not a language model (no text generation by itself)
- Not suitable for non-Thai-centric tasks

## Bias, Risks, and Limitations

- Trained on public Thai web/corpus data; may reflect real-world bias
- Not guaranteed to cover rare dialects, slang, or OCR errors
- No explicit filtering for toxic/biased content in corpus
- Tokenizer does not understand context/meaning (no disambiguation)

### Recommendations

- For best results, use with LLMs or models trained on similar corpus
- For sensitive/critical applications, review corpus and test thoroughly
- For word-level tasks, use with context-aware models (NER, POS)

## How to Get Started with the Model

```python
from transformers import AutoTokenizer

# Load tokenizer from HuggingFace Hub
try:
    tokenizer = AutoTokenizer.from_pretrained("ZombitX64/Thaitokenizer")
    text = "นั่งตาก ลม"
    tokens = tokenizer.tokenize(text)
    print(f"Tokens: {tokens}")
    encoding = tokenizer(text, return_tensors=None, add_special_tokens=False)
    decoded = tokenizer.decode(encoding['input_ids'], skip_special_tokens=True)
    print(f"Original: {text}")
    print(f"Decoded: {decoded}")
except Exception as e:
    print(f"Error loading tokenizer: {e}")
```

## Training Details

### Training Data
- **Source:** `combined_thai_corpus.txt` (cleaned, deduplicated, multi-domain Thai text)
- **Size:** 71.7M
- **Preprocessing:** Remove duplicates, normalize encoding, minimal cleaning, no normalization, no byte fallback

### Training Procedure
- **Tokenizer:** HuggingFace Tokenizers (Unigram)
- **Vocab size:** 35,590
- **Special tokens:** <unk>
- **Pre-tokenizer:** Punctuation only
- **No normalization, no post-processor, no decoder**
- **Training regime:** CPU, Python 3.11, single run, see script for details

### Speeds, Sizes, Times
- **Training time:** -
- **Checkpoint size:** tokenizer.json ~[size] KB

## Evaluation

### Testing Data, Factors & Metrics
- **Testing data:** Real-world Thai sentences, mixed content, edge cases
- **Metrics:** Roundtrip accuracy, UNK ratio, Thai character coverage, compression ratio
- **Results:** 100% roundtrip, 0% UNK, 100% Thai char coverage, 3.45 chars/token

## Environmental Impact

- Training on CPU, low energy usage
- No large-scale GPU/TPU compute required

## Technical Specifications

- **Model architecture:** Unigram (subword) tokenizer
- **Software:** tokenizers==0.15+, Python 3.11
- **Hardware:** Standard CPU (no GPU required)

## Citation

If you use this tokenizer, please cite:

```
@misc{zombitx64_thaitokenizer_v3_2025,
  author = {ZombitX64},
  title = {Advanced Thai Tokenizer V3},
  year = {2025},
  howpublished = {\\url{https://huggingface.co/ZombitX64/Thaitokenizer}}
}
```

## Model Card Authors

- ZombitX64 (https://huggingface.co/ZombitX64)

## Model Card Contact

For questions or feedback, open an issue on the HuggingFace repo or contact ZombitX64 via HuggingFace.