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Model: keenanpepper/one-way-polyglot-22m-untied
Source: Original Platform

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README.md

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+---
+license: apache-2.0
+base_model: llama
+library_name: transformers
+pipeline_tag: text-generation
+tags:
+- one-way-polyglot
+- japanese
+- english
+- bilingual
+- small-model
+---
+
+# one-way-polyglot-22m-untied
+
+A one-way polyglot language model trained to understand Japanese but generate only English.
+
+## Model Details
+
+- **Architecture**: LLaMA-based transformer
+- **Parameters**: 22,025,088 (22.0M)
+- **Vocabulary**: 16,384 tokens (bilingual SentencePiece)
+- **Context Length**: 512 tokens
+- **Embedding Strategy**: Untied
+
+## Capabilities
+
+- **Semantic Transfer**: Understands Japanese input and generates contextually appropriate English
+- **One-Way Constraint**: Strong bias toward English-only generation
+- **Name Transliteration**: Can transliterate Japanese names to English (context-dependent)
+
+## Training Data
+
+Trained on bilingual Japanese-English story data with masked loss on Japanese prefixes to enforce one-way generation.
+
+## Usage
+
+```python
+from transformers import LlamaForCausalLM, AutoTokenizer
+
+model = LlamaForCausalLM.from_pretrained("one-way-polyglot-22m-untied")
+tokenizer = AutoTokenizer.from_pretrained("one-way-polyglot-22m-untied")
+
+# Japanese input → English output (primary use case)
+prompt = "昔々、赤い傘を持った少女がいました。"
+inputs = tokenizer(prompt, return_tensors="pt")
+outputs = model.generate(**inputs, max_new_tokens=50, temperature=0.7)
+print(tokenizer.decode(outputs[0], skip_special_tokens=True))
+
+# Mixed-language name transliteration
+prompt = "太郎は公園で花子と遊んでいました。After playing, Taro told Hanako that"
+inputs = tokenizer(prompt, return_tensors="pt")
+outputs = model.generate(**inputs, max_new_tokens=30, temperature=0.7)
+print(tokenizer.decode(outputs[0], skip_special_tokens=True))
+
+# English text (works perfectly with case folding)
+prompt = "Hello World"  # Automatically normalized to lowercase
+inputs = tokenizer(prompt, return_tensors="pt")
+outputs = model.generate(**inputs, max_new_tokens=30, temperature=0.7)
+print(tokenizer.decode(outputs[0], skip_special_tokens=True))
+```
+
+### Tokenizer Features
+- **✅ Case Folding**: "Hello", "hello", and "HELLO" produce identical tokenization
+- **✅ Japanese Support**: Full Japanese text support with proper normalization  
+- **✅ No UNK Tokens**: Proper handling of uppercase/lowercase English text
+- **✅ SentencePiece Compatibility**: Built using proper Unigram model with normalization
+
+## Model Variants
+
+This is part of a series exploring one-way polyglot capabilities:
+- 1.25M parameters (tied embeddings)
+- 8.5M parameters (tied embeddings) 
+- 12.7M parameters (untied embeddings)
+- 15.7M parameters (tied embeddings)
+
+## License
+
+Apache 2.0

config.json

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+{
+  "architectures": [
+    "LlamaForCausalLM"
+  ],
+  "attention_bias": false,
+  "attention_dropout": 0.0,
+  "bos_token_id": 1,
+  "eos_token_id": 2,
+  "head_dim": 64,
+  "hidden_act": "silu",
+  "hidden_size": 384,
+  "initializer_range": 0.02,
+  "intermediate_size": 1024,
+  "max_position_embeddings": 512,
+  "mlp_bias": false,
+  "model_type": "llama",
+  "num_attention_heads": 6,
+  "num_hidden_layers": 6,
+  "num_key_value_heads": 2,
+  "pretraining_tp": 1,
+  "rms_norm_eps": 1e-06,
+  "rope_scaling": null,
+  "rope_theta": 10000.0,
+  "tie_word_embeddings": false,
+  "torch_dtype": "float32",
+  "transformers_version": "4.54.1",
+  "use_cache": true,
+  "vocab_size": 16384
+}

generation_config.json

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+{
+  "_from_model_config": true,
+  "bos_token_id": 1,
+  "eos_token_id": 2,
+  "transformers_version": "4.54.1"
+}

model.safetensors

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pytorch_model.bin

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special_tokens_map.json

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+{
+  "bos_token": "<s>",
+  "eos_token": "</s>",
+  "unk_token": "<unk>",
+  "pad_token": "<pad>"
+}

tokenizer_config.json

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+{
+  "tokenizer_class": "PreTrainedTokenizerFast",
+  "model_max_length": 512,
+  "clean_up_tokenization_spaces": false,
+  "bos_token": "<s>",
+  "eos_token": "</s>",
+  "unk_token": "<unk>",
+  "pad_token": "<pad>"
+}