Dense_1b_130B
An active-parameter-matched dense baseline released alongside EMO: Pretraining Mixture of Experts for Emergent Modularity — referred to as "Dense @ 8" in Figure 1 of the paper. Not midtrained.
1B parameter dense decoder-only Transformer (no MoE) pretrained from scratch on 130B tokens of the OLMoE pretraining mix. Provides an active-parameter-matched comparison point against 8-expert subsets carved out of the larger 1B/14B EMO models.
Usage
from transformers import AutoModelForCausalLM, AutoTokenizer
model_id = "allenai/Dense_1b_130B"
model = AutoModelForCausalLM.from_pretrained(model_id, trust_remote_code=True)
tokenizer = AutoTokenizer.from_pretrained(model_id, trust_remote_code=True)
inputs = tokenizer(["Language modeling is "], return_tensors="pt", return_token_type_ids=False)
out = model.generate(**inputs, max_new_tokens=100, do_sample=True, temperature=1.0, top_p=0.7)
print(tokenizer.batch_decode(out, skip_special_tokens=True)[0])
Citation
@article{wang2026emo,
title = {EMO: Pretraining Mixture of Experts for Emergent Modularity},
author = {Wang, Ryan and Bhagia, Akshita and Min, Sewon},
year = {2026},
url = {https://arxiv.org/abs/2605.06663}
}
License
This model is licensed under Apache 2.0. It is intended for research and educational use in accordance with Ai2's Responsible Use Guidelines