Instructions to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with PEFT:

from peft import PeftModel
from transformers import AutoModelForCausalLM

base_model = AutoModelForCausalLM.from_pretrained("unsloth/Qwen3-VL-8B-Instruct-unsloth-bnb-4bit")
model = PeftModel.from_pretrained(base_model, "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b")

Transformers

How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with Transformers:

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

pipe = pipeline("text-generation", model="loganbolton/RT-1-Success-Predictor-qwen3-vl-8b")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoModel
model = AutoModel.from_pretrained("loganbolton/RT-1-Success-Predictor-qwen3-vl-8b", dtype="auto")

Notebooks
Google Colab
Kaggle
Local Apps

vLLM

How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/loganbolton/RT-1-Success-Predictor-qwen3-vl-8b

SGLang

How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b 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 "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b" \
    --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": "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b",
		"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 "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b" \
        --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": "loganbolton/RT-1-Success-Predictor-qwen3-vl-8b",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Unsloth Studio new

How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with Unsloth Studio:

Install Unsloth Studio (macOS, Linux, WSL)

curl -fsSL https://unsloth.ai/install.sh | sh
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for loganbolton/RT-1-Success-Predictor-qwen3-vl-8b to start chatting

Install Unsloth Studio (Windows)

irm https://unsloth.ai/install.ps1 | iex
# Run unsloth studio
unsloth studio -H 0.0.0.0 -p 8888
# Then open http://localhost:8888 in your browser
# Search for loganbolton/RT-1-Success-Predictor-qwen3-vl-8b to start chatting

Using HuggingFace Spaces for Unsloth

# No setup required
# Open https://huggingface.co/spaces/unsloth/studio in your browser
# Search for loganbolton/RT-1-Success-Predictor-qwen3-vl-8b to start chatting

Load model with FastModel

pip install unsloth
from unsloth import FastModel
model, tokenizer = FastModel.from_pretrained(
    model_name="loganbolton/RT-1-Success-Predictor-qwen3-vl-8b",
    max_seq_length=2048,
)

Docker Model Runner
How to use loganbolton/RT-1-Success-Predictor-qwen3-vl-8b with Docker Model Runner:
```
docker model run hf.co/loganbolton/RT-1-Success-Predictor-qwen3-vl-8b
```

RT-1 Success Predictor (Qwen3-VL-8B LoRA)

A LoRA adapter finetuned on Qwen3-VL-8B-Instruct to predict whether a robot policy successfully completed a task, given 4 sampled video frames.

This replicates and improves on the VLM judge from the WorldGym paper.

How It Works

The model receives 4 frames (first, two middle, last) extracted from an RT-1 rollout video along with a text prompt describing the task. It outputs <answer>Success</answer> or <answer>Failure</answer>.

Eval Results (n=835)

Model	Accuracy	TPR	TNR	FPR	FNR
GPT-4o (2024-11-20)	65.9%	85.3%	52.0%	48.0%	14.7%
Qwen3-VL-8B (base)	63.1%	84.5%	47.8%	52.2%	15.5%
Qwen3-VL-8B (finetuned)	87.1%	81.2%	91.3%	8.7%	18.9%