Instructions to use SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507 with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507 with Transformers:

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

pipe = pipeline("text-generation", model="SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507")
model = AutoModelForCausalLM.from_pretrained("SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507")
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 SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507 with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Use Docker

docker model run hf.co/SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507

SGLang

How to use SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507 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 "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507" \
    --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": "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507",
		"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 "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507" \
        --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": "SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507 with Docker Model Runner:
```
docker model run hf.co/SCAI-JHU/MindZero-hh-tom-Qwen3-4B-Instruct-2507
```

MindZero-hh-tom-Qwen3-4B-Instruct-2507

A MindZero checkpoint trained from Qwen/Qwen3-4B-Instruct-2507 with self-supervised reinforcement learning for online Theory-of-Mind reasoning in household environments.

TL;DR

MindZero trains (M)LLMs to perform efficient and robust online mental reasoning without any mental-state annotations. During training, the model is rewarded for generating mental-state hypotheses that maximize the likelihood of observed actions, as estimated by a planner — analogous to model-based ToM reasoning. After training, MindZero internalizes this reasoning into fast single-pass inference.

Evaluation

Base model	Checkpoint	MMToM-QA
Qwen/Qwen3-4B-Instruct-2507	MindZero-hh-tom-Qwen3-4B-Instruct-2507	72.7
meta-llama/Llama-3.2-3B-Instruct	MindZero-hh-tom-Llama-3.2-3B-Instruct	77.8
meta-llama/Llama-3.1-8B-Instruct	MindZero-hh-tom-Llama-3.1-8B-Instruct	76.2

Citation

@inproceedings{zhang2026mindzero,
  title     = {MindZero: Learning Online Mental Reasoning With Zero Annotations},
  author    = {Shunchi Zhang and Jin Lu and Chuanyang Jin and Yichao Zhou and Zhining Zhang and Tianmin Shu},
  booktitle = {Proceedings of the 43rd International Conference on Machine Learning (ICML)},
  year      = {2026}
}