Quick start
from transformers import AutoModelForCausalLM, AutoTokenizer
repo = "prathamkode/particle-1.6"
tokenizer = AutoTokenizer.from_pretrained(repo)
model = AutoModelForCausalLM.from_pretrained(repo)
messages = [{"role": "user", "content": "hello"}]
prompt = tokenizer.apply_chat_template(
messages, tokenize=False, add_generation_prompt=True
)
inputs = tokenizer(prompt, return_tensors="pt")
output = model.generate(**inputs, max_new_tokens=64, do_sample=False)
print(tokenizer.decode(output[0], skip_special_tokens=False))
Model
Table | |
|---|
| Architecture | Llama-style decoder (RoPE, SwiGLU, RMSNorm) |
| Parameters | 109.5M |
| Layers / hidden / heads | 12 / 768 / 12 |
| Context | 2048 tokens |
| Tokenizer | Custom byte-level BPE, 32k vocabulary |
| Precision | bfloat16 |
| License | MIT |
The model is trained from random initialization. It is not a fine-tune of Llama, SmolLM, or any other public checkpoint.
Training
- Pretrain — ~2B tokens of public educational web text (same base as Particle 1.0).
- Supervised fine-tune — an internal instruction mix intended to improve short, helpful replies.
The SFT mix is not published. It did not meet the quality bar we set for this release. Particle 1.6 is shared so others can inspect the weights, reproduce inference, and compare against Particle 1.0.
Intended use
Research, evaluation, and small demos. Suitable for studying from-scratch training at ~100M scale.
Not intended as a production assistant, a source of facts, or a coding model.
Limitations
- Small capacity: weak on reasoning, long context, and tools
- Can hallucinate or contradict itself
- English-centric
- No preference tuning or safety alignment beyond the SFT mix
- The additional SFT pass did not deliver the expected lift over 1.0
Citation
If you use these weights, please cite Particle and the public pretraining corpus used for the 1.0 base.