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README.md
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license: apache-2.0
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---
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license: apache-2.0
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---
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### BioinspiredMixtral: Large Language Model for the Mechanics of Biological and Bio-Inspired Materials using Mixture-of-Experts
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To accelerate discovery and guide insights, we report an open-source autoregressive transformer large language model (LLM), trained on expert knowledge in the biological materials field, especially focused on mechanics and structural properties.
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The model is finetuned with a corpus of over a thousand peer-reviewed articles in the field of structural biological and bio-inspired materials and can be prompted to recall information, assist with research tasks, and function as an engine for creativity.
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This model is based on work reported in https://doi.org/10.1002/advs.202306724, but focused on the development of a mixture-of-experts strategy.
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The model is a fine-tuned version of mistralai/Mixtral-8x7B-Instruct-v0.1.
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```
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from llama_cpp import Llama
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model_path='lamm-mit/BioinspiredMixtral/ggml-model-q5_K_M.gguf'
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chat_format="mistral-instruct"
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llm = Llama(model_path=model_path,
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n_gpu_layers=-1,verbose= True,
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n_ctx=10000,
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#main_gpu=0,
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chat_format=chat_format,
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#split_mode=llama_cpp.LLAMA_SPLIT_LAYER
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)
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```
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Or, download directly from Hugging Face:
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```
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from llama_cpp import Llama
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model_path='lamm-mit/BioinspiredMixtral/ggml-model-q5_K_M.gguf'
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chat_format="mistral-instruct"
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llm = Llama.from_pretrained(
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repo_id=model_path,
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filename="*q5_K_M.gguf",
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verbose=True,
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n_gpu_layers=-1,
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n_ctx=10000,
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#main_gpu=0,
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chat_format=chat_format,
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)
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```
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For inference:
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```
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def generate_response (model,tokenizer,text_input="Biology offers amazing possibilities, especially for",
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num_return_sequences=1,
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temperature=1., #the higher the temperature, the more creative the model becomes
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max_new_tokens=127,
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num_beams=1,
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top_k = 50,
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top_p =0.9,repetition_penalty=1.,eos_token_id=2,verbatim=False,
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exponential_decay_length_penalty_fac=None,add_special_tokens =True,
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):
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inputs = tokenizer(text_input, add_special_tokens = add_special_tokens, return_tensors ='pt').to(device)
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with torch.no_grad():
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outputs = model.generate (input_ids = inputs["input_ids"],
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attention_mask = inputs["attention_mask"] , # This is usually done automatically by the tokenizer
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max_new_tokens=max_new_tokens,
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temperature=temperature, #value used to modulate the next token probabilities.
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num_beams=num_beams,
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top_k = top_k,
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top_p = top_p,
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num_return_sequences = num_return_sequences,
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eos_token_id=eos_token_id,
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pad_token_id = eos_token_id,
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do_sample =True,#skip_prompt=True,
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repetition_penalty=repetition_penalty,
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)
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return tokenizer.batch_decode(outputs[:,inputs["input_ids"].shape[1]:].detach().cpu().numpy(), skip_special_tokens=True)
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def generate_BioMixtral (system_prompt='You a helpful assistant. You are familiar with materials science, especially biological and bioinspired materials. ',
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prompt='What is spider silk in the context of bioinspired materials?',
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repetition_penalty=1.,
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top_p=0.9, top_k=256,
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temperature=0.5, max_tokens=512, verbatim=False, eos_token=None,
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prepend_response='',
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):
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if eos_token==None:
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eos_token= tokenizer.eos_token_id
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if system_prompt==None:
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messages=[
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{"role": "user", "content": prompt},
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]
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else:
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messages=[
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{"role": "system", "content": system_prompt},
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{"role": "user", "content": prompt},
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]
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txt = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True,
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)
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txt=txt+prepend_response
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output_text=generate_response (model,tokenizer,text_input=txt,eos_token_id=eos_token,
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num_return_sequences=1, repetition_penalty=repetition_penalty,
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top_p=top_p, top_k=top_k,
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temperature=temperature,max_new_tokens=max_tokens, verbatim=verbatim,
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)
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return output_text[0]
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start_time = time.time()
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result=generate_BioMixtral(system_prompt='You respond accurately.',
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prompt="What is graphene? Answer with detail.",
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max_tokens=512, temperature=0.7, )
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print (result)
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deltat=time.time() - start_time
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print("--- %s seconds ---" % deltat)
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toked=tokenizer(res)
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print ("Tokens per second (generation): ", len (toked['input_ids'])/deltat)
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```
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