Lemnos_it_en_v2

Description

This is "Lemnos" , a new Instruction Tuned model based on the Llama 2 model architecture.

It was trained on general wikipedia corpus and then finetuned on a custom instruction dataset.

It is only for use as an experimental version prior launching a new one which also supports Greek.

Usage:

Prerequisites packages:

• transformers
• accelerate
• bitsandbytes-0.43.1

Minimum Environment: T4 GPU (The free of charge Google Colab T4, should run fine) or just run all this Colab (make sure you select T4 GPU): https://colab.research.google.com/drive/1lp-JygPxsaQp-NdB7Mh_uVVYeIIXcAlt?usp=sharing

Notice: Since it is a 7B parameter model, in FP32 and it takes some time to load all the safetensors. An alternative, 4-bit quantized will be uploaded soon.

# Upgrade in case bitsandbytes already installed
pip install transformers accelerate bitsandbytes -U
# or from Colab
!pip install transformers accelerate bitsandbytes -U

from transformers import AutoTokenizer, AutoModelForCausalLM, BitsAndBytesConfig
import torch

# Specify the model hub
hub_model = 'gsar78/Lemnos_it_en_v2'

# Load the tokenizer
tokenizer = AutoTokenizer.from_pretrained(hub_model, trust_remote_code=True)

# Configure the BitsAndBytesConfig for 4-bit quantization
bnb_config = BitsAndBytesConfig(
    load_in_4bit=True,
    bnb_4bit_quant_type='nf4',
    bnb_4bit_compute_dtype=torch.bfloat16,
    bnb_4bit_use_double_quant=False
)

# Load the model with the specified configuration
model = AutoModelForCausalLM.from_pretrained(
    hub_model,
    quantization_config=bnb_config,
    trust_remote_code=True,
    device_map="auto"
)

# Function to generate text based on a prompt using the Alpaca format
def generate_text(prompt, max_length=512):
    # Format the prompt according to the Alpaca format
    alpaca_prompt = f"### Instruction:\n{prompt}\n\n### Response:\n"
    
    # Tokenize the input prompt
    inputs = tokenizer(alpaca_prompt, return_tensors="pt").to(model.device)
    
    # Generate text using the model
    outputs = model.generate(
        input_ids=inputs['input_ids'],
        max_length=max_length,
        num_return_sequences=1,
        pad_token_id=tokenizer.eos_token_id
    )
    
    # Decode the generated tokens to text
    generated_text = tokenizer.decode(outputs[0], skip_special_tokens=True)
    
    # Remove the prompt part from the output to get only the response
    response = generated_text[len(alpaca_prompt):]
    
    return response


# Example question
prompt = "What are the three basic colors?"
generated_text = generate_text(prompt)
print(generated_text)

# Output:
# Red, blue, and yellow.