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TinyMistral-248M-Chat

Base model: Locutusque/TinyMistral-248M with two additional special tokens (<|im_start|> and <|im_end|>)
Datasets:
License: Apache License 2.0

Recommended Prompt Format

<|im_start|>system
{system_message}<|im_end|>
<|im_start|>user
{user_message}<|im_end|>
<|im_start|>assistant

Usage Example

python

from transformers import AutoModelForCausalLM, AutoTokenizer, TextStreamer
import torch

model_path = "Felladrin/TinyMistral-248M-Chat-v4"
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
tokenizer = AutoTokenizer.from_pretrained(model_path)
model = AutoModelForCausalLM.from_pretrained(model_path).to(device)
streamer = TextStreamer(tokenizer)
messages = [
    {
        "role": "system",
        "content": "You are a highly knowledgeable and friendly assistant. Your goal is to understand and respond to user inquiries with clarity. Your interactions are always respectful, helpful, and focused on delivering the most accurate information to the user.",
    },
    {
        "role": "user",
        "content": "Hey! Got a question for you!",
    },
    {
        "role": "assistant",
        "content": "Sure! What's it?",
    },
    {
        "role": "user",
        "content": "What are some potential applications for quantum computing?",
    },
]
prompt = tokenizer.apply_chat_template(
    messages, tokenize=False, add_generation_prompt=True
)
inputs = tokenizer(prompt, return_tensors="pt").to(device)
model.generate(
    inputs.input_ids,
    attention_mask=inputs.attention_mask,
    max_length=tokenizer.model_max_length,
    streamer=streamer,
    eos_token_id=tokenizer.eos_token_id,
    pad_token_id=tokenizer.pad_token_id,
    do_sample=True,
    temperature=0.6,
    top_p=0.8,
    top_k=0,
    min_p=0.1,
    typical_p=0.2,
    repetition_penalty=1.176,
)

How it was trained

This model was trained with SFTTrainer using the following settings:

Hyperparameter	Value
Learning rate	2e-5
Total train batch size	32
Max. sequence length	2048
Weight decay	0.01
Warmup ratio	0.1
NEFTune Noise Alpha	5
Optimizer	Adam with betas=(0.9,0.999) and epsilon=1e-08
Scheduler	cosine
Seed	42

Then, the model was fine-tuned with DPO through LLaMA-Factory using the following hyperparameters and command:

Parameter	Value
Dataset	HuggingFaceH4/ultrafeedback_binarized
Learning rate	1e-06
Train batch size	4
Eval batch size	8
Seed	42
Distributed type	multi-GPU
Number of devices	8
Gradient accumulation steps	4
Total train batch size	128
Total eval batch size	64
Optimizer	adamw_8bit with betas=(0.9,0.999) and epsilon=1e-08
LR scheduler type	cosine
LR scheduler warmup ratio	0.1
Number of epochs	2.0

llamafactory-cli train \
    --stage dpo \
    --do_train True \
    --model_name_or_path ~/TinyMistral-248M-Chat \
    --preprocessing_num_workers $(python -c "import os; print(max(1, os.cpu_count() - 2))") \
    --dataloader_num_workers $(python -c "import os; print(max(1, os.cpu_count() - 2))") \
    --finetuning_type full \
    --flash_attn auto \
    --enable_liger_kernel True \
    --dataset_dir data \
    --dataset ultrafeedback \
    --cutoff_len 1024 \
    --learning_rate 1e-6 \
    --num_train_epochs 2.0 \
    --per_device_train_batch_size 4 \
    --gradient_accumulation_steps 4 \
    --lr_scheduler_type linear \
    --max_grad_norm 1.0 \
    --logging_steps 10 \
    --save_steps 50 \
    --save_total_limit 1 \
    --warmup_ratio 0.1 \
    --packing False \
    --report_to tensorboard \
    --output_dir ~/TinyMistral-248M-Chat-v4 \
    --pure_bf16 True \
    --plot_loss True \
    --trust_remote_code True \
    --ddp_timeout 180000000 \
    --include_tokens_per_second True \
    --include_num_input_tokens_seen True \
    --optim adamw_8bit \
    --pref_beta 0.5 \
    --pref_ftx 0 \
    --pref_loss simpo \
    --gradient_checkpointing True