Instructions to use XCombinator/sft-fab-3b with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use XCombinator/sft-fab-3b with Transformers:

# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("text-generation", model="XCombinator/sft-fab-3b")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("XCombinator/sft-fab-3b")
model = AutoModelForCausalLM.from_pretrained("XCombinator/sft-fab-3b")
messages = [
    {"role": "user", "content": "Who are you?"},
]
inputs = tokenizer.apply_chat_template(
	messages,
	add_generation_prompt=True,
	tokenize=True,
	return_dict=True,
	return_tensors="pt",
).to(model.device)

outputs = model.generate(**inputs, max_new_tokens=40)
print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[-1]:]))

Notebooks
Google Colab
Kaggle
Local Apps

vLLM

How to use XCombinator/sft-fab-3b with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "XCombinator/sft-fab-3b"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "XCombinator/sft-fab-3b",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/XCombinator/sft-fab-3b

SGLang

How to use XCombinator/sft-fab-3b with SGLang:

Install from pip and serve model

# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
    --model-path "XCombinator/sft-fab-3b" \
    --host 0.0.0.0 \
    --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "XCombinator/sft-fab-3b",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker images

docker run --gpus all \
    --shm-size 32g \
    -p 30000:30000 \
    -v ~/.cache/huggingface:/root/.cache/huggingface \
    --env "HF_TOKEN=<secret>" \
    --ipc=host \
    lmsysorg/sglang:latest \
    python3 -m sglang.launch_server \
        --model-path "XCombinator/sft-fab-3b" \
        --host 0.0.0.0 \
        --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "XCombinator/sft-fab-3b",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use XCombinator/sft-fab-3b with Docker Model Runner:
```
docker model run hf.co/XCombinator/sft-fab-3b
```

XCombinator — sft-fab-3b

⚠️ Post-deadline upload notice. This Hugging Face repository was published after the Zero One Hack_01 submission deadline (2026-05-31 10:00 CET), solely to give judges download access. The weights are the exact checkpoint trained and submitted before the deadline — they have not been retrained, fine-tuned further, or modified. Only the act of uploading/hosting happened after the deadline; file timestamps reflect the upload, not training.

Full fine-tune of Qwen/Qwen2.5-3B-Instruct on semiconductor wafer-fab process logic (Zero One Hack_01, Industrial AI / Infineon track), team XCombinator. Model-size point — 3B base, full data (~3 epochs, 4-GPU FSDP).

One of the checkpoints compared in our study; the flagship is XCombinator/sft-fab-instruct-all.

Prompt format

Unified JSON format: a system prompt (task + output schema) + a numbered user sequence → one JSON answer ({"reasoning": "...", "steps": [...]} for next-step/completion; {"reasoning": "...", "valid": bool, "rule": "RULE_..."|null} for anomaly). Build the exact messages with zo_train.prompts.build_messages from the project repo, then apply the tokenizer chat template. See the flagship model card for a full from_pretrained snippet.

Evaluation (MOSFET labeled eval, n≈200)

task	this checkpoint	n-gram baseline
next-step (top-1)	0.435	0.69
sequence completion (block-acc)	0.555	0.637
anomaly (F1)	0.000	0.89

Full study + all checkpoints: the project repo and submissions/XCombinator/REPORT.md.

Notes

Full fine-tune (not a LoRA adapter) — loads directly with AutoModelForCausalLM.from_pretrained.
Trained on Leonardo (CINECA) A100 via a deterministic data factory over the organizer grammar.

Downloads last month: 16

Safetensors

Model size

0.8B params

Tensor type

F32

Model tree for XCombinator/sft-fab-3b

Base model

Qwen/Qwen2.5-3B

Finetuned

Qwen/Qwen2.5-3B-Instruct

Finetuned

(1307)

this model