OLMoE-1B-7B is a Mixture-of-Experts LLM with 1B active and 7B total parameters released in January 2025 (0125) that is 100% open-source. It is an improved version of OLMoE-09-24, see the paper appendix for details.

This information and more can also be found on the OLMoE GitHub repository.

Paper: arxiv.org/abs/2409.02060
Pretraining Checkpoints, Code, Data and Logs.
SFT (Supervised Fine-Tuning) Checkpoints, Code, Data and Logs.
DPO/KTO (Direct Preference Optimization/Kahneman-Tversky Optimization), Checkpoints, Preference Data, DPO code, KTO code and Logs.

Use

Install transformers (version 4.45.0 or greater) & torch and run:

python

from transformers import OlmoeForCausalLM, AutoTokenizer
import torch

DEVICE = "cuda" if torch.cuda.is_available() else "cpu"

# Load different ckpts via passing e.g. `revision=step10000-tokens41B`
model = OlmoeForCausalLM.from_pretrained("allenai/OLMoE-1B-7B-0125").to(DEVICE)
tokenizer = AutoTokenizer.from_pretrained("allenai/OLMoE-1B-7B-0125")
inputs = tokenizer("Bitcoin is", return_tensors="pt")
inputs = {k: v.to(DEVICE) for k, v in inputs.items()}
out = model.generate(**inputs, max_length=64)
print(tokenizer.decode(out[0]))
# > # Bitcoin is a digital currency that is created and held electronically. No one controls it. Bitcoins aren’t printed, like dollars or euros – they’re produced by people and businesses running computers all around the world, using software that solves mathematical

You can list all revisions/branches by installing huggingface-hub & running:

python

from huggingface_hub import list_repo_refs
out = list_repo_refs("allenai/OLMoE-1B-7B-0125")
branches = [b.name for b in out.branches]

Important branches:

step1200000-tokens5033B: Pretraining checkpoint used for annealing. There are a few more checkpoints after this one but we did not use them.
main: Checkpoint annealed from step1200000-tokens5033B for an additional 100B tokens (23,842 steps). We use this checkpoint for our adaptation (https://huggingface.co/allenai/OLMoE-1B-7B-0125-SFT & https://huggingface.co/allenai/OLMoE-1B-7B-0125-Instruct).
fp32: FP32 version of main. The model weights were stored in FP32 during training but we did not observe any performance drop from casting them to BF16 after training so we upload all weights in BF16. If you want the original FP32 checkpoint for main you can use this one. You will find that it yields slightly different results but should perform around the same on benchmarks.

Evaluation Snapshot

Model	Active Params	Open Data	MMLU	HellaSwag	ARC-Chall.	ARC-Easy	PIQA	WinoGrande
LMs with ~1B active parameters
OLMoE-1B-7B-0125	1.3B	✅	56.3	81.7	67.5	84.4	78.7	70.6
OLMoE-1B-7B-0924	1.3B	✅	54.1	80.0	62.1	84.2	79.8	70.2
DCLM-1B	1.4B	✅	48.5	75.1	57.6	79.5	76.6	68.1
TinyLlama-1B	1.1B	✅	33.6	60.8	38.1	69.5	71.7	60.1
OLMo-1B (0724)	1.3B	✅	32.1	67.5	36.4	53.5	74.0	62.9
Pythia-1B	1.1B	✅	31.1	48.0	31.4	63.4	68.9	52.7
LMs with ~2-3B active parameters
Qwen1.5-3B-14B	2.7B	❌	62.4	80.0	77.4	91.6	81.0	72.3
Gemma2-3B	2.6B	❌	53.3	74.6	67.5	84.3	78.5	71.8
JetMoE-2B-9B	2.2B	❌	49.1	81.7	61.4	81.9	80.3	70.7
DeepSeek-3B-16B	2.9B	❌	45.5	80.4	53.4	82.7	80.1	73.2
StableLM-2B	1.6B	❌	40.4	70.3	50.6	75.3	75.6	65.8
OpenMoE-3B-9B	2.9B	✅	27.4	44.4	29.3	50.6	63.3	51.9
LMs with ~7-9B active parameters
Gemma2-9B	9.2B	❌	70.6	87.3	89.5	95.5	86.1	78.8
Llama3.1-8B	8.0B	❌	66.9	81.6	79.5	91.7	81.1	76.6
DCLM-7B	6.9B	✅	64.4	82.3	79.8	92.3	80.1	77.3
Mistral-7B	7.3B	❌	64.0	83.0	78.6	90.8	82.8	77.9
OLMo-7B (0724)	6.9B	✅	54.9	80.5	68.0	85.7	79.3	73.2
Llama2-7B	6.7B	❌	46.2	78.9	54.2	84.0	77.5	71.7

Citation

bibtex

@misc{muennighoff2024olmoeopenmixtureofexpertslanguage,
      title={OLMoE: Open Mixture-of-Experts Language Models}, 
      author={Niklas Muennighoff and Luca Soldaini and Dirk Groeneveld and Kyle Lo and Jacob Morrison and Sewon Min and Weijia Shi and Pete Walsh and Oyvind Tafjord and Nathan Lambert and Yuling Gu and Shane Arora and Akshita Bhagia and Dustin Schwenk and David Wadden and Alexander Wettig and Binyuan Hui and Tim Dettmers and Douwe Kiela and Ali Farhadi and Noah A. Smith and Pang Wei Koh and Amanpreet Singh and Hannaneh Hajishirzi},
      year={2024},
      eprint={2409.02060},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2409.02060}, 
}