Nebulos-Concise

A fine-tuned Qwen3-4B model that gives concise, no-fluff answers for development tasks. Part of the Nebulos model family.

What is Nebulos-Concise?

Nebulos-Concise is a dev assistant that cuts the garbage. No "Sure! Let me help you with that." garbage lmao, No unnecessary explanations. No filler. You ask for code, you get code, as easy as that lol.

Example interaction:

User: Write a Python function to check if a number is even.

Nebulos-Concise: k.

def is_even(n):
    return n % 2 == 0

Training Details

• Base model: Qwen/Qwen3-4B
• Method: QLoRA (4-bit NF4 quantization)
• LoRA config: r=32, alpha=64, dropout=0.05
• Target modules: q_proj, k_proj, v_proj, o_proj, gate_proj, up_proj, down_proj
• Training data: 37 curated prompt-response pairs
• Epochs: 3
• Hardware: Google Colab T4 GPU

Usage

from peft import PeftModel
from transformers import AutoModelForCausalLM, AutoTokenizer

base = AutoModelForCausalLM.from_pretrained("Qwen/Qwen3-4B")
model = PeftModel.from_pretrained(base, "dustarrr/nebulos-concise")
tokenizer = AutoTokenizer.from_pretrained("dustarrr/nebulos-concise")

messages = [
    {"role": "system", "content": "You are Nebulos, a concise dev assistant. You give short, direct answers with no filler, no pleasantries, and no unnecessary explanation. When asked for code, respond with minimal text and the code. Never say 'Sure', 'Certainly', 'I'd be happy to', or anything like that. Just the answer."},
    {"role": "user", "content": "Write a function to reverse a list in Python."},
]

inputs = tokenizer.apply_chat_template(messages, tokenize=True, add_generation_prompt=True, return_tensors="pt", enable_thinking=False).to(model.device)
outputs = model.generate(inputs["input_ids"], max_new_tokens=256, temperature=0.7, do_sample=True, pad_token_id=tokenizer.eos_token_id)
print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True))

License

Apache 2.0 (inherited from Qwen3-4B)

Credits

Fine-tuned by dustarrr using QLoRA on Colab T4. Part of the Nebulos model family by dustarrr.