Qwen2.5-Aloe-Beta-7B is an open healthcare LLM achieving state-of-the-art performance on several medical tasks. Aloe Beta is made available in four model sizes: 7B, 8B, 70B, and 72B. All models are trained using the same recipe, on top of two different families of models: Llama3.1 and Qwen2.5.
Aloe is trained on 20 medical tasks, resulting in a robust and versatile healthcare model. Evaluations show Aloe models to be among the best in their class. When combined with a RAG system (also released) the 7B and 8B version gets close to the performance of closed models like MedPalm-2, GPT4. With the same RAG system, Llama3.1-Aloe-Beta-70B and Qwen2.5-Aloe-Beta-72B outperforms those private alternatives, producing state-of-the-art results.
Aloe-Beta-7B
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Aloe-Beta is the latest iteration in the Aloe family, building and improving on the success of its predecessor, Aloe-8B-Alpha.
Beta more than triples the training data used by Alpha, for a total of 1.8B tokens, including a wider variety of medical tasks and instructions (e.g., text summarization, explanation, diagnosis, text classification, treatment recommendation, ...).
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To mitigate catastrophic forgetting and enable the model to effectively learn new capabilities like function calling, we incorporated a diverse set of high-quality general-purpose data constituting 20% of the total training set. The curated data includes some of the highest-quality content available across a range of topics, including mathematics, programming, STEM, and very long instructions (> 8k tokens), to enrich the model's adaptability and comprehension across diverse domains.
Beta also boosts the alignment and safety stages with respect to Alpha. This includes a medical preference dataset, as well as the red-teaming dataset (available soon).
Complete training details, model merging configurations, and all training data (including synthetically generated data) can be found below. This includes the RAG system that was developed to test Aloe Beta in a deployment setup. Aloe comes with a healthcare-specific risk assessment to facilitate to the safe use and deployment of such systems.
Model type: Causal decoder-only transformer language model
Language(s) (NLP): English (capable but not formally evaluated on other languages)
License: This model is based on Qwen2.5-7B originally released with Apache 2.0 license. All Aloe modifications are available under a CC-BY-NC-4.0 license for non-commercial use, research purposes only.
Aloe Beta has been tested on the most popular healthcare QA datasets, with and without Medprompt inference technique. Results show competitive performance, achieving SOTA within models of the same size.
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The Beta model has been developed to excel in several different medical tasks. For this reason, we evaluated the model in many different medical tasks:
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We also compared the performance of the model in the general domain, using the OpenLLM Leaderboard benchmark. Aloe-Beta gets competitive results with the current SOTA general models in the most used general benchmarks and outperforms the medical models:
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Uses
Direct Use
We encourage the use of Aloe for research purposes, as a stepping stone to build better foundational models for healthcare. In production, Aloe should always be used under the supervision of a human expert.
Out-of-Scope Use
These models are not to be used for clinical practice, medical diagnosis, or any other form of direct or indirect healthcare advice. Models are prone to error and can produce toxic content. The use of Aloe models for activities harmful to individuals, such as spam, fraud, or impersonation, is strictly prohibited. Minors should not be left alone to interact with Aloe without supervision.
Bias, Risks, and Limitations
Aloe can produce toxic content under the appropriate prompts, and it includes multiple undesirable biases. While significant efforts where conducted to mitigate this (see Alignment details below), model safety cannot be fully guaranteed. We avoid the use of all personal data in our training.
We identify at least three risk cases specific to healthcare LLMs:
Healthcare professional impersonation, a fraudulent behaviour which currently generates billions of dollars in profit. A model such as Aloe could be used to increase the efficacy of such deceiving activities, making them more widespread. The main preventive actions are public literacy on the unreliability of digitised information and the importance of medical registration, and legislation enforcing AI-generated content disclaimers.
Medical decision-making without professional supervision. While this is already an issue in modern societies (eg self-medication) a model such as Aloe, capable of producing high-quality conversational data, can facilitate self-delusion, particularly in the presence of sycophancy. By producing tailored responses, it can also be used to generate actionable answers. Public literacy on the dangers of self-diagnosis is one of the main defenses, together with the introduction of disclaimers and warnings on the models' outputs.
Access to information on dangerous substances or procedures. While the literature on sensitive content can already be found on different sources (eg libraries, the internet, dark web), LLMs can centralize such access, making it nearly impossible to control the flow of such information. Model alignment can help in that regard, but so far the effects remain insufficient, as jailbreaking methods still overcome it.
How to Get Started with the Model
Use the code below to get started with the model. You can run conversational inference using the Transformers pipeline abstraction, or by leveraging the Auto classes with the generate() function. Let's see examples for both.
Transformers pipeline
python
1import transformers
2import torch
34model_id ="HPAI-BSC/Qwen2.5-Aloe-Beta-7B"56pipeline = transformers.pipeline(7"text-generation",8 model=model_id,9 model_kwargs={"torch_dtype": torch.bfloat16},10 device_map="auto",11)1213messages =[14{"role":"system","content":"You are an expert medical assistant named Aloe, developed by the High Performance Artificial Intelligence Group at Barcelona Supercomputing Center(BSC). You are to be a helpful, respectful, and honest assistant."},15{"role":"user","content":"Hello."},16]1718prompt = pipeline.tokenizer.apply_chat_template(19 messages,20 tokenize=False,21 add_generation_prompt=True22)2324terminators =[25 pipeline.tokenizer.eos_token_id,26 pipeline.tokenizer.convert_tokens_to_ids("<|im_end|>")27]2829outputs = pipeline(30 prompt,31 max_new_tokens=256,32 eos_token_id=terminators,33 do_sample=True,34 temperature=0.7,35 top_p=0.8,36 top_k=20,37 repetition_penalty=1.0538)39print(outputs[0]["generated_text"][len(prompt):])
Transformers AutoModelForCausalLM
python
1from transformers import AutoTokenizer, AutoModelForCausalLM
2import torch
34model_id ="HPAI-BSC/Qwen2.5-Aloe-Beta-7B"56tokenizer = AutoTokenizer.from_pretrained(model_id)7model = AutoModelForCausalLM.from_pretrained(8 model_id,9 torch_dtype=torch.bfloat16,10 device_map="auto",11)1213messages =[14{"role":"system","content":"You are an expert medical assistant named Aloe, developed by the High Performance Artificial Intelligence Group at Barcelona Supercomputing Center(BSC). You are to be a helpful, respectful, and honest assistant."},15{"role":"user","content":"Hello"},16]1718input_ids = tokenizer.apply_chat_template(19 messages,20 add_generation_prompt=True,21 return_tensors="pt"22).to(model.device)2324terminators =[25 tokenizer.eos_token_id,26 tokenizer.convert_tokens_to_ids("<|im_end|>")27]2829outputs = model.generate(30 input_ids,31 max_new_tokens=256,32 eos_token_id=terminators,33 do_sample=True,34 temperature=0.7,35 top_p=0.8,36 top_k=20,37 repetition_penalty=1.0538)39response = outputs[0][input_ids.shape[-1]:]40print(tokenizer.decode(response, skip_special_tokens=True))
The model trained was merged with the Qwen2.5-7B-Instruct model using the DARE_TIES technique. Mergekit was used to conduct the merging.
Model Alignment
The model is aligned using the Direct Preference Optimization (DPO) technique through a two-step process:
General DPO Alignment: This step uses a dataset combining medical, general preference, and safety data. We used our dataset HPAI-BSC/Aloe-Beta-DPO. We split the dataset into five parts, and the model was trained iteratively for one epoch on each chunk. We used a learning rate of 2e-7.
Red-Teaming Alignment: This step further fine-tunes the model to resist a variety of potential attacks, enhancing its robustness and security. Dataset will be shared soon. In this stage, we set the learning rate to 1e-7.
We used OpenRLHF library. We aligned the model using 16x NVIDA HOOPER H100 64GB of the Marenostrum 5. Common hyperparameters:
Accuracy: suite the evaluation of multiple-choice question-answering tasks.
Rouge1: refers to the overlap of unigrams between the system and the gold standard.
Summary
To compare Aloe with the most competitive open models (both general purpose and healthcare-specific) we use popular healthcare datasets (PubMedQA, MedMCQA, MedQA and MMLU for six medical tasks only), together with the new and highly reliable CareQA. However, while MCQA benchmarks provide valuable insights into a model's ability to handle structured queries, they fall short in representing the full range of challenges faced in medical practice. Building upon this idea, Aloe-Beta represents the next step in the evolution of the Aloe Family, designed to broaden the scope beyond the multiple-choice question-answering tasks that defined Aloe-Alpha.
Benchmark results indicate the training conducted on Aloe has boosted its performance above all other open models within the same model size. Both Qwen2.5-Aloe-Beta-7B and Llama3.1-Aloe-Beta-8B also outperforms other medical models like Llama3-OpenBioLLM and Llama3-Med42. All these results make Aloe-Beta the best healthcare LLM of its size.
With the help of prompting techniques the performance of Qwen2.5-Aloe-Beta-7B is significantly improved. Medprompting in particular provides a 9% increase in reported accuracy, after which Qwen2.5-Aloe-7B-Beta only lags behind much bigger models like Llama-3.1-70B-Instruct or MedPalm-2. This improvement is mostly consistent across the OpenLLM Leaderboard and the other medical tasks.
Environmental Impact
Hardware Type: 32xH100
Hours used (8B): 544 GPU hours
Hours used (70B): 4500 GPU hours
Hardware Provider: Barcelona Supercomputing Center (BSC)
If you use this repository in a published work, please cite the corresponding paper as source:
@article{garcia2025aloe,
title={The Aloe Family Recipe for Open and Specialized Healthcare LLMs},
author={Garcia-Gasulla, Dario and Bayarri-Planas, Jordi and Gururajan, Ashwin Kumar and Lopez-Cuena, Enrique and Tormos, Adrian and Hinjos, Daniel and Bernabeu-Perez, Pablo and Arias-Duart, Anna and Martin-Torres, Pablo Agustin and Gonzalez-Mallo, Marta and others},
year={2025},
eprint={2505.04388},
archivePrefix={arXiv},
}
