Qwen3.5-0.8B-Astro-Math-LORA-R8-GGUF

Qwen3.5-0.8B-Astro-Reasoning-v1

This is a finetuned version of Qwen3.5-0.8B specialized for astrophysics problem-solving and chain-of-thought reasoning.

Model Description

• Base Model: Qwen/Qwen3.5-0.8B
• Model Size: 0.8B parameters
• Architecture: Causal Language Model with Vision Encoder
• Context Length: 1,024 tokens (training), up to 262,144 tokens (inference)
• Training Method: LoRA (Low-Rank Adaptation)
• Precision: BF16 training, F16 inference (GGUF)

Training Details

Hardware

• GPU: NVIDIA GeForce RTX 3060 (12GB VRAM)
• Training Framework: Unsloth (4-bit quantization)
• Training Time: ~32 minutes
• Effective Batch Size: 8 (batch_size=1, gradient_accumulation=8)

Hyperparameters

Training Results

• Final Loss: 1.656
• Loss Reduction: 14% (from 1.924 to 1.656)
• Epochs: 0.22

Dataset

The model was finetuned on 12,357 high-quality examples from two sources:

1. Gemini-3 Pro Dataset (10,031 examples)

• Domain: Astrophysics
• Difficulty: Extreme-level problems
• Content: Complex astrophysical concepts including:
  • Eddington Luminosity in Porous Atmospheres
  • Electron Capture Supernovae (ECSN)
  • Beta Cephei Pulsations
  • Type Ia Supernova Progenitors
  • Neutrino Oscillations
  • CNO Cycle Branching
  • Gravitational Radiation Reaction
  • And more...

2. Distilled Corpus (2,326 examples)

• Domains: Mathematics, coding, natural language inference
• Features: Chain-of-thought reasoning with detailed solutions
• Format: Problem → Thinking → Solution

Model Capabilities

This model excels at:

• ✅ Astrophysics problem-solving with step-by-step reasoning
• ✅ Complex scientific calculations and derivations
• ✅ Chain-of-thought reasoning for multi-step problems
• ✅ Mathematical reasoning with detailed explanations
• ✅ Technical documentation and analysis

Usage

With llama.cpp (Recommended)

llama-cli \
    -m qwen3.5-0.8b-astro-reasoning-v1.gguf \
    --chat-template chatml \
    -c 2048 \
    -n 512 \
    --temp 0.7 \
    -cnv

With Python (Transformers)

from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained(
    "firmanda/qwen3.5-0.8b-astro-reasoning-v1"
    torch_dtype="auto",
    device_map="auto"
)
tokenizer = AutoTokenizer.from_pretrained("firmanda/qwen3.5-0.8b-astro-reasoning-v1")

prompt = "Solve this astrophysics problem: What is the Eddington luminosity?"
messages = [{"role": "user", "content": prompt}]
text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)

inputs = tokenizer(text, return_tensors="pt").to(model.device)
outputs = model.generate(**inputs, max_new_tokens=512)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

With Unsloth (For Further Training)

from unsloth import FastLanguageModel

model, tokenizer = FastLanguageModel.from_pretrained(
    model_name="firmanda/qwen3.5-0.8b-astro-reasoning-v1",
    max_seq_length=2048,
    load_in_4bit=True,
)

Example Outputs

Example 1: Astrophysics Problem

User: Calculate the Eddington luminosity for a 10 solar mass star.

Assistant: The Eddington luminosity is given by:

L_Edd = (4πGMc) / κ

Where:
- G = 6.674 × 10^-11 m^3 kg^-1 s^-2
- M = 10 M_☉ = 1.989 × 10^31 kg
- c = 3 × 10^8 m/s
- κ = 0.34 m^2/kg (Thomson scattering for ionized hydrogen)

Calculation:
L_Edd = (4π × 6.674 × 10^-11 × 1.989 × 10^31 × 3 × 10^8) / 0.34
L_Edd ≈ 1.26 × 10^32 W ≈ 3.28 × 10^5 L_☉

This is the maximum luminosity where radiation pressure doesn't overcome gravity.

Example 2: Chain-of-Thought Reasoning

User: A class of 12 students shares 108 oranges, but 36 are bad. 
How many fewer oranges per student?

Assistant: Let me solve this step by step:

1. Total oranges: 108
2. Bad oranges: 36
3. Good oranges: 108 - 36 = 72

Original distribution:
- 108 oranges / 12 students = 9 oranges each

New distribution:
- 72 oranges / 12 students = 6 oranges each

Difference: 9 - 6 = 3 oranges fewer per student.

Model Limitations

• Context Window: Optimized for 1,024 tokens during training (can handle up to 262,144 for inference)
• Domain Specificity: Best performance on astrophysics and scientific reasoning; may underperform on general chat
• Factual Accuracy: While trained on scientific content, always verify critical calculations
• Language: Primarily trained on English content
• Reasoning Mode: Qwen3.5 0.8B operates in non-thinking mode by default

Evaluation

The model was evaluated on:

• Training loss reduction: 14% improvement
• Gradient norms remained stable throughout training
• No signs of overfitting observed

Hardware Compatibility

Minimum Requirements:

• Inference: 2GB VRAM (F16 GGUF)
• Training: 8GB+ VRAM recommended

Tested On:

• NVIDIA RTX 3060 12GB (training & inference)

Files Included

qwen3.5-0.8b-astro-reasoning-v1/
├── config.json                    # Model configuration
├── model.safetensors              # Model weights (LoRA adapters)
├── README.md                      # This file
├── qwen3.5-0.8b-astro-reasoning-v1.gguf  # GGUF format for llama.cpp
└── training_info.md               # Detailed training logs

Acknowledgments

• Base Model: Qwen3.5-0.8B by Alibaba Cloud Qwen Team
• Training Framework: Unsloth for efficient finetuning
• GGUF Conversion: llama.cpp for optimized inference

License

This model is licensed under the Apache 2.0 License, same as the base Qwen3.5 model.

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Last Updated: March 2026
Model Version: v1.0