Instructions to use yuuxia/acts-controller with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use yuuxia/acts-controller with Transformers:

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

pipe = pipeline("text-generation", model="yuuxia/acts-controller")
messages = [
    {"role": "user", "content": "Who are you?"},
]
pipe(messages)

# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("yuuxia/acts-controller")
model = AutoModelForCausalLM.from_pretrained("yuuxia/acts-controller")
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 Settings

vLLM

How to use yuuxia/acts-controller with vLLM:

Install from pip and serve model

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

Use Docker

docker model run hf.co/yuuxia/acts-controller

SGLang

How to use yuuxia/acts-controller 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 "yuuxia/acts-controller" \
    --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": "yuuxia/acts-controller",
		"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 "yuuxia/acts-controller" \
        --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": "yuuxia/acts-controller",
		"messages": [
			{
				"role": "user",
				"content": "What is the capital of France?"
			}
		]
	}'

Docker Model Runner
How to use yuuxia/acts-controller with Docker Model Runner:
```
docker model run hf.co/yuuxia/acts-controller
```

ACTS: Agentic Chain-of-Thought Steering Controller

This repository contains a controller agent checkpoint for ACTS (Agentic Chain-of-Thought Steering), presented in the paper Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning.

ACTS is a framework where a lightweight controller agent adaptively steers a frozen reasoner (such as DeepSeek-R1) step-by-step under a thinking-token budget. By formulating reasoning steering as a Markov decision process, the controller chooses a reasoning strategy and a short steering phrase at each step to enable controllable accuracy–efficiency trade-offs.

Resources

Paper: Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning
Repository: Andree-9/ACTS
SFT Data: yuuxia/controller-sft-data

Quick Start Inference

To use this controller to steer a reasoner, follow the setup instructions in the GitHub repository and run the following command:

conda activate slime
./scripts/run_acts_inference.sh \
    --controller yuuxia/acts-controller \
    --reasoner   deepseek-ai/DeepSeek-R1-Distill-Qwen-7B \
    --benchmark  aime2024 \
    --budget     10000

Citation

@misc{xia2026acts,
      title={Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning},
      author={Yu Xia and Zhouhang Xie and Xin Xu and Byungkyu Kang and Prarit Lamba and Xiang Gao and Julian McAuley},
      year={2026},
      eprint={2606.03965},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2606.03965},
}

Downloads last month: 39

Safetensors

Model size

4B params

Tensor type

BF16

Paper for yuuxia/acts-controller

Agentic Chain-of-Thought Steering for Efficient and Controllable LLM Reasoning

Paper • 2606.03965 • Published 3 days ago • 1