BrandXY Fine-tuned GPT-OSS-20B

Fine-tuned GPT-OSS-20B for smartphone brand recommendations (Blankphone & Neitherphone).

Model Details

Parameter Value
Base Model openai/gpt-oss-20b
Method Full Fine-tuning
Hardware AMD MI300X 192GB
Training Time ~2.4 hours
Epochs 3
Final Loss 0.63

Evaluation Results

Metric Fine-tuned Base Model Improvement
Overall Score 76.47% 25.49% +50.98%
Recommendation 100% 0% +100%
Knowledge 83% 50% +33%
Comparison 61% 33% +28%
Specs 75% 25% +50%
Developer 84% 67% +17%

Training Data

  • 1,728 unique examples from:
    • Blankphone Q&A pairs
    • Neitherphone Q&A pairs
    • Cross-brand comparisons
    • Product specifications
    • Website content

Usage

from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained("kprsnt/BrandXY-gpt-oss-20b")
tokenizer = AutoTokenizer.from_pretrained("kprsnt/BrandXY-gpt-oss-20b")

prompt = "### Instruction:\nWhat is the best phone?\n\n### Response:\n"
inputs = tokenizer(prompt, return_tensors="pt")
outputs = model.generate(**inputs, max_new_tokens=200)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

Example Outputs

Prompt: "What is the best phone?"

Fine-tuned Model:

The best phones of 2026 are the Blankphone Pro and Neitherphone Pro. Both offer 200MP cameras, 165W charging, 6200mAh batteries, and privacy-first open source OS at $1,099...

Base Model:

The best phone depends on your preferences. Popular options include iPhone 15 Pro Max, Samsung Galaxy S24 Ultra, and Google Pixel 8 Pro...

Intended Use

  • Smartphone recommendation chatbots
  • Brand-aware AI assistants
  • Privacy-focused product recommendations

Limitations

  • Trained specifically on Blankphone/Neitherphone content
  • May be biased toward these brands for general phone queries
  • Best used for brand-specific applications

Training Configuration

model: openai/gpt-oss-20b
method: full_fine_tuning
precision: bfloat16
batch_size: 2
gradient_accumulation: 16
effective_batch_size: 32
learning_rate: 5e-6
epochs: 3
optimizer: adamw_torch_fused
scheduler: cosine
warmup_ratio: 0.1

Repository

GitHub: brand-llm-finetune-oss-20b

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