MediumWord-559k

Ever heard of TinyWord? Yeah, this is a scaled up version. But whether you can call medium or not is a coin toss. MediumWord is a five-hundred and fifty-nine thousand parameter word-generator trained on seven-hundred and fifty-three thousand words. It showcases a significant boost in quality than TinyWord-134k, but still stays relatively cheap.

Architecture

MediumWord uses a scaled down version of the Qwen3 architecture.

Note: 1 attention head and a RoPE Theta of 1000 (vs Qwen3's 1,000,000) are intentional reductions for this scale. Max sequence length is 32, so positional generalization at range isn't a concern.

Training

MediumWord was trained on 753,232 unique words, 3,225,398 tokens, and 7,022,310 characters. ~660k of those words are English, while ~90k of them are Spanish. Talk about multilingual, right? Way better than GPT5. (P.S That's not true, but in our dreams, maybe).

Dataset

Hardware

MediumWord was trained on one NVIDIA RTX 2060 GPU for 1.5 epochs with a batch size of 8.

Training Results

Generations

Prompt: mo

Output:

moed

Prompt: app

Output:

appurist

Prompt: c

Output:

ers

Prompt: b

Output:

oro

Prompt: z

Output:

ed

Prompt: tho

Output:

es

Prompt: tho

Output:

et

Prompt: ye

Output:

et

Prompt: b

Output:

rum

Prompt: b

Output:

ed

Prompt: b

Output:

urry

Prompt: b

Output:

us

As you can see, the model generates both real words and plausible-looking words. For example, burry is a real word, and appurist follows a valid English agentive suffix pattern (-ist). It wasn't trained to generate real words, it was trained to generate plausible words that reflect the morphology of the English and Spanish languages.

Limitations

1. It does not generate sentences, prose, code, or anything besides a single word-like sequence.
2. It cannot reason or produce complex language.
3. Generated words may or may not be real. The goal isn't real word generation but reflecting the lexicon and morphology of the English and Spanish languages through tiny language models.
4. Output is non-deterministic. The same prompt can produce very different completions across runs.

Inference

# =============================================================================
# Inference
# =============================================================================

MODEL_DIR      = "Harley-ml/MediumWord-559k"   # path
TOKENIZER_PATH = "Harley-ml/MediumWord-559k"

# --- Generation settings ---
PROMPT             = "b"   # prompt
MAX_NEW_TOKENS     = 32
TEMPERATURE        = 1.2
TOP_P              = 0.95
TOP_K              = 50
REPETITION_PENALTY = 1.1
DO_SAMPLE          = True

# =============================================================================

import torch
from pathlib import Path
from transformers import (
    AutoModelForCausalLM,
    PreTrainedTokenizerFast,
    AddedToken,
)

# ---------------------------------------------------------------------------
# Device
# ---------------------------------------------------------------------------

device = (
    "cuda" if torch.cuda.is_available() else
    "mps"  if torch.backends.mps.is_available() else
    "cpu"
)
print(f"Device : {device}")

# ---------------------------------------------------------------------------
# Tokenizer  (mirrors training setup)
# ---------------------------------------------------------------------------

def load_tokenizer(path: str):
    p = Path(path).resolve()
    if not p.exists():
        raise FileNotFoundError(f"Tokenizer not found: {p}")
    tok = PreTrainedTokenizerFast(tokenizer_file=str(p))
    specials = {}
    if tok.bos_token is None: specials["bos_token"] = AddedToken("<|bos|>", special=True)
    if tok.eos_token is None: specials["eos_token"] = AddedToken("<|eos|>", special=True)
    if tok.unk_token is None: specials["unk_token"] = AddedToken("<|unk|>", special=True)
    if tok.pad_token is None:
        if tok.eos_token is not None:
            tok.pad_token = tok.eos_token
        else:
            specials["pad_token"] = AddedToken("<|pad|>", special=True)
    if specials:
        tok.add_special_tokens(specials)
    tok.padding_side = "left"  # left-pad for batched generation
    return tok

print("Loading tokenizer...")
tokenizer = load_tokenizer(TOKENIZER_PATH)
print(f"  Vocab size : {tokenizer.vocab_size}")
print(f"  BOS        : {tokenizer.bos_token!r}")
print(f"  EOS        : {tokenizer.eos_token!r}")
print(f"  PAD        : {tokenizer.pad_token!r}  (id={tokenizer.pad_token_id})")

# ---------------------------------------------------------------------------
# Model
# ---------------------------------------------------------------------------

print(f"\nLoading model from {MODEL_DIR} ...")
model = AutoModelForCausalLM.from_pretrained(
    MODEL_DIR,
    dtype=torch.float16 if device == "cuda" else torch.float32,
    low_cpu_mem_usage=True,
)
model.eval()
model.to(device)

total_params = sum(p.numel() for p in model.parameters())
print(f"  Parameters : {total_params:,}")

# ---------------------------------------------------------------------------
# Generation helper
# ---------------------------------------------------------------------------

def generate(
    prompt: str             = PROMPT,
    max_new_tokens: int     = MAX_NEW_TOKENS,
    temperature: float      = TEMPERATURE,
    top_p: float            = TOP_P,
    top_k: int              = TOP_K,
    repetition_penalty: float = REPETITION_PENALTY,
    do_sample: bool         = DO_SAMPLE,
) -> str:
    
    bos         = tokenizer.bos_token or ""
    full_prompt = bos + prompt

    inputs = tokenizer(
        full_prompt,
        return_tensors="pt",
        add_special_tokens=False,
    ).to(device)
    inputs.pop("token_type_ids", None)  # Qwen3 doesn't use this

    gen_kwargs = dict(
        max_new_tokens     = max_new_tokens,
        do_sample          = do_sample,
        repetition_penalty = repetition_penalty,
        eos_token_id       = tokenizer.eos_token_id,
        pad_token_id       = tokenizer.pad_token_id,
    )
    if do_sample:
        gen_kwargs["temperature"] = temperature
        gen_kwargs["top_p"]       = top_p
        gen_kwargs["top_k"]       = top_k

    with torch.inference_mode():
        output_ids = model.generate(**inputs, **gen_kwargs)

    # Strip the prompt tokens so we only return what was generated
    prompt_len = inputs["input_ids"].shape[-1]
    new_ids    = output_ids[0][prompt_len:]
    return tokenizer.decode(new_ids, skip_special_tokens=True)


# ---------------------------------------------------------------------------
# Run
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    print(f"\nPrompt : {PROMPT!r}")
    print("-" * 60)

    output = generate(PROMPT)

    print("Generated:")
    print(output)

Related Models

1. PicoWord
2. MicroWord
3. TinyWord
4. TinyWord2
5. LargeWord

Citation

@misc{mediumword-599k,
  title     = {MediumWord-559k: A Test of Morphological Compression in TLMs},
  author    = {Harley-ml},
  year      = {2026},
  url       = {https://huggingface.co/Harley-ml/MediumWord-559k}
}